Below is a chronological listing of the United States senators from Massachusetts. According to the Seventeenth Amendment to the United States Constitution adopted in 1913, U.S. senators are popularly elected for a six-year term. Elections are held the first Tuesday after November 1, and terms begin on January 3, about two months after the vote. Before 1914, and the enforcement of the Seventeenth Amendment, the state's U.S. senators were chosen by the Massachusetts General Court, and before 1935, their terms began March 4.
The current senators are Democrats Elizabeth Warren and Ed Markey. Ted Kennedy was Massachusetts's longest-serving senator, serving from 1962 until his death in 2009. Massachusetts is one of fourteen states alongside California, Colorado, Georgia, Hawaii, Idaho, Louisiana, Maine, Minnesota, Missouri, Nevada, Pennsylvania, South Dakota and Utah to have a younger senior senator and an older junior senator.
Through the 20th century, mid-term vacancies were filled with the governor's appointee, with the appointment expiring at the next biennial state election. In 2004, the Democratic-controlled state legislature changed the vacancy-filling process, mandating that a special election occur, which removed the governor's appointment power. This statute was enacted over the veto by the governor, Mitt Romney. The leadership of the Massachusetts legislature at the time was concerned that the Republican Governor Mitt Romney would appoint a Republican if Democratic Senator John Kerry were elected president of the United States in the 2004 election. Generally, the law requires a special election within 145 to 160 days from the date of the filing of a Senate resignation. The law contemplates resignations that become effective some period of time after the filing of the resignation, so long as the election occurs after effective date of the resignation.
While terminally ill with brain cancer, Ted Kennedy requested that the Massachusetts legislature change the law to allow an interim appointment. Kennedy died shortly thereafter, and the legislature quickly passed a bill providing for an interim appointment. On September 24, 2009, Governor Deval Patrick signed the bill, and appointed Paul G. Kirk, who had previously served as one of Kennedy's congressional aides and as chairman of the Democratic National Committee.
|- style="height:2em" ! 1 | align=left | <br/>Tristram Dalton<br /> | | Pro-<br/>Admin. | Mar 4, 1789 âÂÂ<br/>Mar 3, 1791 | Elected in 1788.Lost re-election. | 1 | | rowspan=2 | 1 | rowspan=2 | Elected in 1788. | rowspan=4 nowrap | Mar 4, 1789 âÂÂ<br/>Jun 1, 1796 | rowspan=3 | Pro-<br/>Admin. | rowspan=4 align=right | <br/>Caleb Strong<br /> ! rowspan=4 | 1
|- style="height:2em" ! rowspan=3 | 2 | rowspan=3 align=left | <br/>George Cabot<br /> | rowspan=2 | Pro-<br/>Admin. | rowspan=3 nowrap | Mar 4, 1791 âÂÂ<br/>Jun 9, 1796 | rowspan=3 | Elected in 1790.Resigned. | rowspan=5 | 2 |
|- style="height:2em" | | rowspan=5 | 2 | rowspan=2 | Re-elected in 1793.Resigned.
|- style="height:2em" | | Federalist | rowspan=3 | | Federalist
|- style="height:2em" | colspan=3 | Vacant | Jun 9, 1796 âÂÂ<br/>Jun 11, 1796 | Vacant | Vacant | Jun 1, 1796 âÂÂ<br/>Jun 11, 1796 | colspan=3 | Vacant
|- style="height:2em" ! rowspan=5 | 3 | rowspan=5 align=left | <br/>Benjamin Goodhue<br /> | rowspan=5 | Federalist | rowspan=5 nowrap | Jun 11, 1796 âÂÂ<br/>Nov 8, 1800 | Elected to finish Cabot's term. | rowspan=2 | Elected to finish Strong's term.Retired to run for the U.S. House of Representatives. | rowspan=2 nowrap | Jun 11, 1796 âÂÂ<br/>Mar 3, 1799 | rowspan=2 | Federalist | rowspan=2 align=right | <br/>Theodore Sedgwick<br /> ! rowspan=2 | 2
|- style="height:2em" | rowspan=4 | Also elected to full term in 1796.Resigned. | rowspan=8 | 3 |
|- style="height:2em" | rowspan=5 | rowspan=8 | 3 | Elected in 1798.Resigned to become U.S. Secretary of War. | Mar 4, 1799 âÂÂ<br/>May 30, 1800 | | Federalist | align=right | <br/>Samuel Dexter<br /> ! 3
|- style="height:2em" | Vacant | May 31, 1800 âÂÂ<br/>Jun 5, 1800 | colspan=3 | Vacant
|- style="height:2em" | rowspan=4 | Elected to finish Dexter's term.Resigned. | rowspan=4 nowrap | Jun 6, 1800 âÂÂ<br/>Mar 3, 1803 | rowspan=4 | Federalist | rowspan=4 align=right | <br/>Dwight Foster<br /> ! rowspan=4 | 4
|- style="height:2em" | colspan=3 | Vacant | Nov 8, 1800 âÂÂ<br/>Nov 14, 1800 | Vacant
|- style="height:2em" ! rowspan=3 | 4 | rowspan=3 align=left | <br/>Jonathan Mason<br /> | rowspan=3 | Federalist | rowspan=3 nowrap | Nov 14, 1800 âÂÂ<br/>Mar 3, 1803 | rowspan=3 | Elected to finish Goodhue's term.
|- style="height:2em" | rowspan=2
|- style="height:2em" | Vacant | Mar 2, 1803 âÂÂ<br/>Mar 3, 1803 | colspan=3 | Vacant
|- style="height:2em" ! rowspan=3 | 5 | rowspan=3 align=left | <br/>John Quincy Adams<br /> | rowspan=3 | Federalist | rowspan=3 nowrap | Mar 4, 1803 âÂÂ<br/>Jun 8, 1808 | rowspan=3 | Elected in 1803.Resigned, having lost re-election to the next term. | rowspan=4 | 4 | | Elected to finish Dexter's term. | rowspan=5 nowrap | Mar 4, 1803 âÂÂ<br/>Mar 3, 1811 | rowspan=5 | Federalist | rowspan=5 align=right | <br/>Timothy Pickering<br /> ! rowspan=5 | 5
|- style="height:2em" | | rowspan=4 | 4 | rowspan=4 | Re-elected in 1805.Lost re-election.
|- style="height:2em" | rowspan=2
|- style="height:2em" ! rowspan=5 | 6 | rowspan=5 align=left | <br/>James Lloyd<br /> | rowspan=5 | Federalist | rowspan=5 nowrap | Jun 9, 1808 âÂÂ<br/>May 1, 1813 | Elected to finish Adams's term, having already been elected to the next term.
|- style="height:2em" | rowspan=4 | Elected in 1808.Resigned. | rowspan=6 | 5 |
|- style="height:2em" | rowspan=2 | rowspan=8 | 5 | State Senate failed to elect. | nowrap | Mar 4, 1811 âÂÂ<br/>Jun 28, 1811 | colspan=3 | Vacant
|- style="height:2em" | rowspan=7 | Elected in 1811, to finish the vacant term.Retired or lost re-election. | rowspan=7 nowrap | Jun 29, 1811 âÂÂ<br/>Mar 3, 1817 | rowspan=7 | Democratic-<br/>Republican | rowspan=7 align=right | <br/>Joseph Bradley Varnum<br /> ! rowspan=7 | 6
|- style="height:2em" | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | May 1, 1813 âÂÂ<br/>May 5, 1813 | Vacant
|- style="height:2em" ! rowspan=2 | 7 | rowspan=2 align=left | <br/>Christopher Gore<br /> | rowspan=2 | Federalist | rowspan=2 nowrap | May 5, 1813 âÂÂ<br/>May 30, 1816 | Appointed to finish Lloyd's term.
|- style="height:2em" | Elected to full term in 1815.Resigned. | rowspan=9 | 6 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | May 31, 1816 âÂÂ<br/>Jun 11, 1816 | Vacant
|- style="height:2em" ! rowspan=2 | 8 | rowspan=2 align=left | Eli P. Ashmun<br /> | rowspan=2 | Federalist | rowspan=2 nowrap | Jun 12, 1816 âÂÂ<br/>May 10, 1818 | rowspan=2 | Elected to finish Gore's term.Resigned.
|- style="height:2em" | rowspan=3 | rowspan=9 | 6 | rowspan=7 | Elected in 1816.Resigned to run for Mayor of Boston. | rowspan=7 nowrap | Mar 4, 1817 âÂÂ<br/>May 30, 1822 | rowspan=7 | Federalist | rowspan=7 align=right | <br/>Harrison Gray Otis<br /> ! rowspan=7 | 7
|- style="height:2em" | colspan=3 | Vacant | nowrap | May 11, 1818 âÂÂ<br/>Jun 4, 1818 | Vacant
|- style="height:2em" ! rowspan=2 | 9 | rowspan=2 align=left | <br/>Prentiss Mellen<br /> | rowspan=2 | Federalist | rowspan=2 nowrap | Jun 5, 1818 âÂÂ<br/>May 15, 1820 | rowspan=2 | Elected to finish Gore's term.Resigned to become Chief Justice of Maine.
|- style="height:2em" | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | May 16, 1820 âÂÂ<br/>Jun 12, 1820 | Vacant
|- style="height:2em" ! rowspan=8 | 10 | rowspan=8 align=left | <br/>Elijah H. Mills<br /> | rowspan=5 | Federalist | rowspan=8 nowrap | Jun 12, 1820 âÂÂ<br/>Mar 3, 1827 | Elected to finish Gore's term.
|- style="height:2em" | rowspan=7 | Re-elected in 1820.Lost re-election in 1826. | rowspan=7 | 7 | rowspan=3
|- style="height:2em" | Vacant | nowrap | May 30, 1822 âÂÂ<br/>Jun 5, 1822 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Otis's term. | rowspan=3 nowrap | Jun 5, 1822 âÂÂ<br/>May 23, 1826 | rowspan=2 | Federalist | rowspan=3 align=right | <br/>James Lloyd<br /> ! rowspan=3 | 8
|- style="height:2em" | | rowspan=6 | 7 | rowspan=2 | Re-elected in 1822.Resigned.
|- style="height:2em" | rowspan=3 | National<br/>Republican | rowspan=3 | | National<br/>Republican
|- style="height:2em" | Vacant | nowrap | May 23, 1826 âÂÂ<br/>May 31, 1826 | colspan=3 | Vacant
|- style="height:2em" | rowspan=3 | Elected to finish Lloyd's term. | rowspan=6 nowrap | May 31, 1826 âÂÂ<br/>Mar 3, 1835 | rowspan=6 | National<br/>Republican | rowspan=6 align=right| <br/>Nathaniel Silsbee<br /> ! rowspan=6 | 9
|- style="height:2em" | colspan=3 | Vacant | nowrap | Mar 4, 1827 âÂÂ<br/> Jun 8, 1827 | Vacant | rowspan=4 | 8 | rowspan=2
|- style="height:2em" ! rowspan=9 | 11 | rowspan=9 align=left | <br/>Daniel Webster<br /> | rowspan=5 | National<br/>Republican | rowspan=9 nowrap | Jun 8, 1827 âÂÂ<br/>Feb 22, 1841 | rowspan=3 | Elected late in 1827.
|- style="height:2em" | | rowspan=3 | 8 | rowspan=3 | Re-elected in 1828.Retired.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1833. | rowspan=3 | 9 |
|- style="height:2em" | | rowspan=6 | 9 | rowspan=3 | Elected in 1835.Resigned to become Governor of Massachusetts. | rowspan=3 nowrap | Mar 4, 1835 âÂÂ<br/>Jan 5, 1841 | | National<br/>Republican | rowspan=3 align=right | <br/>John Davis<br /> ! rowspan=3 | 10
|- style="height:2em" | rowspan=4 | Whig | | rowspan=2 | Whig
|- style="height:2em" | rowspan=3 | Re-elected in 1839.Resigned to become U.S. Secretary of State. | rowspan=6 | 10 | rowspan=4
|- style="height:2em" | Vacant | nowrap | Jan 5, 1841 âÂÂ<br/>Jan 13, 1841 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Elected to finish Davis's term. | rowspan=5 nowrap | Jan 13, 1841 âÂÂ<br/>Mar 16, 1845 | rowspan=5 | Whig | rowspan=5 align=right | <br/>Isaac C. Bates<br /> ! rowspan=5 | 11
|- style="height:2em" ! rowspan=3 | 12 | rowspan=3 align=left | <br/>Rufus Choate<br /> | rowspan=3 | Whig | rowspan=3 nowrap | Feb 23, 1841 âÂÂ<br/>Mar 3, 1845 | rowspan=3 | Elected to finish Webster's term.Retired.
|- style="height:2em" | | rowspan=5 | 10 | rowspan=3 | Elected to full term in 1841.Died.
|- style="height:2em" |
|- style="height:2em" ! rowspan=5 | 13 | rowspan=5 align=left | <br/>Daniel Webster<br /> | rowspan=5 | Whig | rowspan=5 nowrap | Mar 4, 1845 âÂÂ<br/>Jul 22, 1850 | rowspan=5 | Elected in 1845.Resigned to become U.S. Secretary of State again. | rowspan=8 | 11 | rowspan=3
|- style="height:2em" | Vacant | nowrap | Mar 16, 1845 âÂÂ<br/>Mar 24, 1845 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Bates's term. | rowspan=8 nowrap | Mar 24, 1845 âÂÂ<br/>Mar 3, 1853 | rowspan=8 | Whig | rowspan=8 align=right | <br/>John Davis<br /> ! rowspan=8 | 12
|- style="height:2em" | | rowspan=7 | 11 | rowspan=7 | Re-elected in 1847.Retired.
|- style="height:2em" | rowspan=4
|- style="height:2em" | colspan=3 | Vacant | nowrap | Jul 23, 1850 âÂÂ<br/>Jul 30, 1850 | Vacant
|- style="height:2em" ! 14 | align=left | <br/>Robert C. Winthrop<br /> | | Whig | nowrap | Jul 30, 1850 âÂÂ<br/>Feb 1, 1851 | Appointed to continue Webster's term.Lost election to finish Webster's term.
|- style="height:2em" ! 15 | align=left | <br/>Robert Rantoul Jr.<br /> | | Democratic | nowrap | Feb 1, 1851 âÂÂ<br/>Mar 3, 1851 | Elected to finish Webster's term.Retired.
|- style="height:2em" | colspan=3 | Vacant | nowrap | Mar 4, 1851 âÂÂ<br/>Apr 24, 1851 | rowspan=7 scope=row class=small | Elected late after the state legislature deadlocked on Daniel Webster's successor | rowspan=7 | 12 | rowspan=2
|- style="height:2em" ! rowspan=16 | 16 | rowspan=16 align=left | <br/>Charles Sumner<br /> | rowspan=6 | Free Soil | rowspan=16 nowrap | Apr 24, 1851 âÂÂ<br/>Mar 11, 1874
|- style="height:2em" | rowspan=4 | rowspan=6 | 12 | Elected in 1853.Resigned. | Mar 4, 1853 âÂÂ<br/>Jun 1, 1854 | | Whig | align=right | <br/>Edward Everett<br /> ! 13
|- style="height:2em" | Vacant | Jun 1, 1854 âÂÂ<br/>Jun 3, 1854 | colspan=3 | Vacant
|- style="height:2em" | Appointed to continue Everett's term.Successor was elected. | Jun 3, 1854 âÂÂ<br/>Jan 31, 1855 | | Whig | align=right | <br/>Julius Rockwell<br /> ! 14
|- style="height:2em" | rowspan=3 | Elected to finish Everett's term. | rowspan=10 nowrap | Jan 31, 1855 âÂÂ<br/>Mar 3, 1873 | | Know Nothing | rowspan=10 align=right | <br/>Henry Wilson<br /> ! rowspan=10 | 15
|- style="height:2em" | | rowspan=9 | Republican
|- style="height:2em" | rowspan=8 | Republican | rowspan=3 | Re-elected in 1857. | rowspan=3 | 13 |
|- style="height:2em" | | rowspan=3 | 13 | rowspan=3 | Re-elected in 1859.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1863. | rowspan=3 | 14 |
|- style="height:2em" | | rowspan=3 | 14 | rowspan=3 | Re-elected in 1865.
|- style="height:2em" |
|- style="height:2em" | rowspan=4 | Re-elected in 1869.Died. | rowspan=6 | 15 |
|- style="height:2em" | | rowspan=6 | 15 | Re-elected in 1871.Resigned to become the Vice President of the United States.
|- style="height:2em" | rowspan=2 | Liberal Republican | rowspan=4 | Vacant | nowrap | Mar 3, 1873 âÂÂ<br/>Mar 17, 1873 | colspan=3 | Vacant
|- style="height:2em" | rowspan=4 | Elected to finish Wilson's term.Lost renomination. | rowspan=4 nowrap | Mar 17, 1873 âÂÂ<br/>Mar 3, 1877 | rowspan=4 | Republican | rowspan=4 align=right | <br/>George S. Boutwell<br /> ! rowspan=4 | 16
|- style="height:2em" | colspan=3 | Vacant | nowrap | Mar 12, 1874 âÂÂ<br/>Apr 16, 1874 | Vacant
|- style="height:2em" ! 17 | align=left | <br/>William B. Washburn<br /> | | Republican | nowrap | Apr 17, 1874 âÂÂ<br/>Mar 3, 1875 | Elected to finish Sumner's term.Retired.
|- style="height:2em" ! rowspan=9 | 18 | rowspan=9 align=left | <br/>Henry L. Dawes<br /> | rowspan=9 | Republican | rowspan=9 nowrap | Mar 4, 1875 âÂÂ<br/>Mar 3, 1893 | rowspan=3 | Elected in 1875. | rowspan=3 | 16 |
|- style="height:2em" | | rowspan=3 | 16 | rowspan=3 | Elected in 1877. | rowspan=14 nowrap | Mar 4, 1877 âÂÂ<br/>Sep 30, 1904 | rowspan=14 | Republican | rowspan=14 align=right | <br/>George F. Hoar<br /> ! rowspan=14 | 17
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1881. | rowspan=3 | 17 |
|- style="height:2em" | | rowspan=3 | 17 | rowspan=3 | Re-elected in 1883.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1887.Retired. | rowspan=3 | 18 |
|- style="height:2em" | | rowspan=3 | 18 | rowspan=3 | Re-elected in 1889.
|- style="height:2em" |
|- style="height:2em" ! rowspan=18 | 19 | rowspan=18 align=left | <br/>Henry Cabot Lodge<br /> | rowspan=18 | Republican | rowspan=18 nowrap | Mar 4, 1893 âÂÂ<br/>Nov 9, 1924 | rowspan=3 | Elected in 1893. | rowspan=3 | 19 |
|- style="height:2em" | | rowspan=3 | 19 | rowspan=3 | Re-elected in 1895.
|- style="height:2em" |
|- style="height:2em" | rowspan=5 | Re-elected in 1899. | rowspan=5 | 20 |
|- style="height:2em" | | rowspan=5 | 20 | rowspan=2 | Re-elected in 1901.Died.
|- style="height:2em" | rowspan=3
|- style="height:2em" | Vacant | nowrap | Sep 30, 1904 âÂÂ<br/>Oct 12, 1904 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Appointed to continue Hoar's term.Elected to finish Hoar's term. | rowspan=5 nowrap | Oct 12, 1904 âÂÂ<br/>Mar 3, 1913 | rowspan=5 | Republican | rowspan=5 align=right | <br/>Winthrop M. Crane<br /> ! rowspan=5 | 18
|- style="height:2em" | rowspan=3 | Re-elected in 1905. | rowspan=3 | 21 |
|- style="height:2em" | | rowspan=3 | 21 | rowspan=3 | Re-elected in 1907.Retired.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1911. | rowspan=3 | 22 |
|- style="height:2em" | | rowspan=3 | 22 | rowspan=3 | Elected in 1913.Lost re-election. | rowspan=3 nowrap | Mar 4, 1913 âÂÂ<br/>Mar 3, 1919 | rowspan=3 | Republican | rowspan=3 align=right | <br/>John W. Weeks<br /> ! rowspan=3 | 19
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1916. | rowspan=3 | 23 |
|- style="height:2em" | | rowspan=5 | 23 | rowspan=5 | Elected in 1918.Lost re-election. | rowspan=5 nowrap | Mar 4, 1919 âÂÂ<br/>Mar 3, 1925 | rowspan=5 | Democratic | rowspan=5 align=right | <br/>David I. Walsh<br /> ! rowspan=5 | 20
|- style="height:2em" |
|- style="height:2em" | Re-elected in 1922.Died. | rowspan=6 | 24 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 9, 1924 âÂÂ<br/>Nov 13, 1924 | Vacant
|- style="height:2em" ! rowspan=2 | 20 | rowspan=2 align=left | <br/>William M. Butler<br /> | rowspan=2 | Republican | rowspan=2 nowrap | Nov 13, 1924 âÂÂ<br/>Dec 6, 1926 | rowspan=2 | Appointed to continue Lodge's term.Lost election to finish Lodge's term.
|- style="height:2em" | rowspan=2 | rowspan=4 | 24 | rowspan=4 | Elected in 1924.Retired. | rowspan=4 nowrap | Mar 4, 1925 âÂÂ<br/>Mar 3, 1931 | rowspan=4 | Republican | rowspan=4 align=right| <br/>Frederick H. Gillett<br /> ! rowspan=4 | 21
|- style="height:2em" ! rowspan=14 | 21 | rowspan=14 align=left | <br/>David I. Walsh<br /> | rowspan=14 | Democratic | rowspan=14 nowrap | Dec 6, 1926 âÂÂ<br/>Jan 3, 1947 | rowspan=2 | Elected to finish Lodge's term.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1928. | rowspan=3 | 25 |
|- style="height:2em" | | rowspan=3 | 25 | rowspan=3 | Elected in 1930.Retired. | rowspan=3 nowrap | Mar 4, 1931 âÂÂ<br/>Jan 3, 1937 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>Marcus A. Coolidge<br /> ! rowspan=3 | 22
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1934. | rowspan=3 | 26 |
|- style="height:2em" | | rowspan=3 | 26 | rowspan=3 | Elected in 1936. | rowspan=4 nowrap | Jan 3, 1937 âÂÂ<br/>Feb 3, 1944 | rowspan=4 | Republican | rowspan=4 align=right | <br/>Henry Cabot Lodge Jr.<br /> ! rowspan=4 | 23
|- style="height:2em" |
|- style="height:2em" | rowspan=6 | Re-elected in 1940.Lost re-election. | rowspan=6 | 27 |
|- style="height:2em" | rowspan=4 | rowspan=6 | 27 | Re-elected in 1942.Resigned to return to active duty in the U.S. Army.
|- style="height:2em" | Vacant | nowrap | Feb 4, 1944 âÂÂ<br/>Feb 7, 1944 | colspan=3 | Vacant
|- style="height:2em" | Appointed to continue Lodge's term.Retired when his successor was elected. | Feb 8, 1944 âÂÂ<br/>Dec 19, 1944 | | Republican | align=right | <br/>Sinclair Weeks<br /> ! 24
|- style="height:2em" | rowspan=3 | Elected to finish Lodge's term.Didn't take seat until Jan 4, 1945 in order to remain Governor of Massachusetts. | rowspan=15 nowrap | Dec 19, 1944 âÂÂ<br/>Jan 3, 1967 | rowspan=15 | Republican | rowspan=15 align=right | <br/>Leverett Saltonstall<br /> ! rowspan=15 | 25
|- style="height:2em" |
|- style="height:2em" ! rowspan=3 | 22 | rowspan=3 align=left | <br/>Henry Cabot Lodge Jr.<br /> | rowspan=3 | Republican | rowspan=3 nowrap | Jan 3, 1947 âÂÂ<br/>Jan 3, 1953 | rowspan=3 | Elected in 1946.Lost re-election. | rowspan=3 | 28 |
|- style="height:2em" | | rowspan=3 | 28 | rowspan=3 | Re-elected in 1948.
|- style="height:2em" |
|- style="height:2em" ! rowspan=4 | 23 | rowspan=4 align=left | <br/>John F. Kennedy<br /> | rowspan=4 | Democratic | rowspan=4 nowrap | Jan 3, 1953 âÂÂ<br/>Dec 22, 1960 | rowspan=3 | Elected in 1952. | rowspan=3 | 29 |
|- style="height:2em" | | rowspan=5 | 29 | rowspan=5 | Re-elected in 1954.
|- style="height:2em" |
|- style="height:2em" | Re-elected in 1958.Resigned to become U.S. President. | rowspan=6 | 30 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | Dec 22, 1960 âÂÂ<br/>Dec 27, 1960 | Vacant
|- style="height:2em" ! rowspan=2 | 24 | rowspan=2 align=left | <br/>Benjamin Smith<br /> | rowspan=2 | Democratic | rowspan=2 nowrap | Dec 27, 1960 âÂÂ<br/>Nov 7, 1962 | rowspan=2 | Appointed to continue John Kennedy's term.Retired when his successor was elected.
|- style="height:2em" | rowspan=2 | rowspan=4 | 30 | rowspan=4 | Re-elected in 1960.Retired.
|- style="height:2em" ! rowspan=26 | 25 | rowspan=26 align=left | <br/>Ted Kennedy<br /> | rowspan=26 | Democratic | rowspan=26 nowrap | Nov 7, 1962 âÂÂ<br/>Aug 25, 2009 | rowspan=2 | Elected to finish his brother's term.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1964. | rowspan=3 | 31 |
|- style="height:2em" | | rowspan=3 | 31 | rowspan=3 | Elected in 1966. | rowspan=6 nowrap | Jan 3, 1967 âÂÂ<br/>Jan 3, 1979 | rowspan=6 | Republican | rowspan=6 align=right | <br/>Edward Brooke<br /> ! rowspan=6 | 26
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1970. | rowspan=3 | 32 |
|- style="height:2em" | | rowspan=3 | 32 | rowspan=3 | Re-elected in 1972.Lost re-election.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1976. | rowspan=3 | 33 |
|- style="height:2em" | | rowspan=4 | 33 | rowspan=3 | Elected in 1978.Retired and resigned early to give successor preferential seniority. | rowspan=3 nowrap | Jan 3, 1979 âÂÂ<br/>Jan 2, 1985 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>Paul Tsongas<br /> ! rowspan=3 | 27
|- style="height:2em" |
|- style="height:2em" | rowspan=4 | Re-elected in 1982. | rowspan=4 | 34 | rowspan=2
|- style="height:2em" | Appointed to finish Tsongas's term, having already been elected to the next term. | rowspan=19 nowrap | Jan 2, 1985 âÂÂ<br/>Feb 1, 2013 | rowspan=19 | Democratic | rowspan=19 align=right | <br/>John Kerry<br /> ! rowspan=19 | 28
|- style="height:2em" | | rowspan=3 | 34 | rowspan=3 | Elected in 1984.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1988. | rowspan=3 | 35 |
|- style="height:2em" | | rowspan=3 | 35 | rowspan=3 | Re-elected in 1990.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 1994. | rowspan=3 | 36 |
|- style="height:2em" | | rowspan=3 | 36 | rowspan=3 | Re-elected in 1996.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 2000. | rowspan=3 | 37 |
|- style="height:2em" | | rowspan=3 | 37 | rowspan=3 | Re-elected in 2002.
|- style="height:2em" |
|- style="height:2em" | rowspan=2 | Re-elected in 2006.Died. | rowspan=6 | 38 |
|- style="height:2em" | rowspan=3 rowspan=4 | rowspan=8 | 38 | rowspan=6 | Re-elected in 2008.Resigned to become U.S. Secretary of State.
|- style="height:2em" | colspan=3 | Vacant | nowrap | Aug 25, 2009 âÂÂ<br/>Sep 24, 2009 | Vacant
|- style="height:2em" ! 26 | align=left | <br/>Paul G. Kirk<br /> | | Democratic | nowrap | Sep 24, 2009 âÂÂ<br/>Feb 4, 2010 | Appointed to continue Ted Kennedy's term.Retired when his successor was elected.
|- style="height:2em" ! rowspan=2 | 27 | rowspan=2 align=left | <br/>Scott Brown<br /> | rowspan=2 | Republican | rowspan=2 nowrap | Feb 4, 2010 âÂÂ<br/>Jan 3, 2013 | rowspan=2 | Elected to finish Ted Kennedy's term.Lost re-election.
|- style="height:2em" |
|- style="height:2em" ! rowspan=10 | 28 | rowspan=10 align=left | <br/>Elizabeth Warren<br /> | rowspan=10 | Democratic | rowspan=10 nowrap | Jan 3, 2013 âÂÂ<br/>present | rowspan=5 | Elected in 2012. | rowspan=5 | 39 | rowspan=3
|- style="height:2em" | Appointed to continue Kerry's term.Retired when his successor was elected. | nowrap | Feb 1, 2013 âÂÂ<br/>Jul 15, 2013 | | Democratic | align=right | <br/>Mo Cowan<br /> ! 29
|- style="height:2em" | Elected to finish Kerry's term. | rowspan=7 nowrap | Jul 16, 2013 âÂÂ<br/>present | rowspan=7 | Democratic | rowspan=7 align=right | <br/>Ed Markey<br /> ! rowspan=7 | 30
|- style="height:2em" | | rowspan=3 | 39 | rowspan=3 | Re-elected in 2014.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Re-elected in 2018. | rowspan=3 | 40 |
|- style="height:2em" | | rowspan=3 | 40 | rowspan=3 | Re-elected in 2020.
|- style="height:2em" |
|- style="height:2em" | rowspan=2 | Re-elected in 2024. | rowspan=2 |41 |
|- style="height:2em" | | 41 | colspan=5 | To be determined in the 2026 election.