This is a list of United States senators from Maryland, which ratified the United States Constitution April 28, 1788, becoming the seventh state to do so. To provide for continuity of government, the framers divided senators into staggered classes that serve six-year terms, and Maryland's senators are in the first and third classes. Before the passage of the Seventeenth Amendment to the United States Constitution in 1913, which allowed for direct election of senators, Maryland's senators were chosen by the Maryland General Assembly, which ratified the amendment on April 1, 2010. Until the assembly appointed George L. Wellington of Cumberland in 1897, senators in class 3 were chosen from the Eastern Shore while senators in class 1 were chosen from the remainder of the state. Barbara Mikulski has been Maryland's longest-serving senator (1987âÂÂ2017).
|- style="height:2em" ! rowspan=2 | 1 | rowspan=2 align=left | <br/>Charles Carroll<br /> | rowspan=2 | Pro-<br/>Admin. | rowspan=2 nowrap | Mar 4, 1789 âÂÂ<br/>Nov 30, 1792 | Elected in 1788. | 1 | | rowspan=5 | 1 | rowspan=5 | Elected in 1788. | rowspan=9 nowrap | Mar 4, 1789 âÂÂ<br/>Dec 10, 1797 | rowspan=9 | Pro-<br/>Admin. | rowspan=9 align=right | John Henry<br /> ! rowspan=9 | 1
|- style="height:2em" | Re-elected in 1791.Resigned to remain in the Maryland Senate. | rowspan=7 | 2 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 30, 1792 âÂÂ<br/>Jan 10, 1793 |
|- style="height:2em" ! rowspan=3 | 2 | rowspan=3 align=left | <br/>Richard Potts<br /> | rowspan=3 | Pro-<br/>Admin. | rowspan=3 nowrap | Jan 10, 1793 âÂÂ<br/>Oct 24, 1796 | rowspan=3 | Elected to finish Carroll's term.Resigned.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | rowspan=8 | 2 | rowspan=4 | Re-elected in 1795.Resigned to become Governor of Maryland.
|- style="height:2em" | colspan=3 | Vacant | nowrap | Oct 24, 1796 âÂÂ<br/>Nov 30, 1796 |
|- style="height:2em" ! rowspan=8 | 3 | rowspan=8 align=left | <br/>John Eager Howard<br /> | rowspan=8 | Federalist | rowspan=8 nowrap | Nov 30, 1796 âÂÂ<br/>Mar 3, 1803 | Elected to finish Carroll's term.
|- style="height:2em" | rowspan=7 | Re-elected in 1796.Lost re-election. | rowspan=7 | 3 | rowspan=2
|- style="height:2em" | rowspan=2 | Elected to finish Henry's term.Resigned. | rowspan=2 nowrap | Dec 11, 1797 âÂÂ<br/>Dec 1, 1800 | rowspan=2 | Federalist | rowspan=2 align=right | James Lloyd<br /> ! rowspan=2 | 2
|- style="height:2em" | rowspan=3
|- style="height:2em" | | nowrap | Dec 1, 1800 âÂÂ<br/>Dec 12, 1800 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Henry's term. | rowspan=2 nowrap | Dec 12, 1800 âÂÂ<br/>Nov 19, 1801 | rowspan=2 | Federalist | rowspan=2 align=right | <br/>William Hindman<br /> ! rowspan=2 | 3
|- style="height:2em" | rowspan=2 | rowspan=6 | 3 | Appointed to fill the vacancy after the Legislature failed to elect.Retired when successor elected.
|- style="height:2em" | rowspan=3 | Elected to finish term.Resigned to become Governor of Maryland. | rowspan=3 nowrap | Nov 19, 1801 âÂÂ<br/>Nov 12, 1806 | rowspan=3 | Democratic-<br/>Republican | rowspan=3 align=right | <br/>Robert Wright<br /> ! rowspan=3 | 4
|- style="height:2em" ! rowspan=9 | 4 | rowspan=9 align=left | <br/>Samuel Smith<br /> | rowspan=9 | Democratic-<br/>Republican | rowspan=9 nowrap | Mar 4, 1803 âÂÂ<br/>Mar 3, 1815 | rowspan=5 | Elected in 1802. | rowspan=5 | 4 |
|- style="height:2em" | rowspan=3
|- style="height:2em" | | nowrap | Nov 12, 1806 âÂÂ<br/>Nov 25, 1806 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Wright's term. | rowspan=4 nowrap | Nov 25, 1806 âÂÂ<br/>Mar 3, 1813 | rowspan=4 | Democratic-<br/>Republican | rowspan=4 align=right | <br/>Philip Reed<br /> ! rowspan=4 | 5
|- style="height:2em" | | rowspan=3 | 4 | rowspan=3 | Re-elected in 1806.
|- style="height:2em" | rowspan=4 | Re-elected in 1809. | rowspan=4 | 5 |
|- style="height:2em" |
|- style="height:2em" | rowspan=2 | rowspan=7 | 5 | Legislature failed to elect. | nowrap | Mar 3, 1813 âÂÂ<br/>May 21, 1813 | colspan=3 | Vacant
|- style="height:2em" | rowspan=6 | Elected in 1813 to finish term. | rowspan=6 nowrap | May 21, 1813 âÂÂ<br/>Mar 3, 1819 | rowspan=6 | Federalist | rowspan=6 align=right | Robert Henry Goldsborough<br /> ! rowspan=6 | 6
|- style="height:2em" | colspan=3 | Vacant | nowrap | Mar 4, 1815 âÂÂ<br/>Jan 29, 1816 | Legislature failed to elect | rowspan=8 | 6 | rowspan=4
|- style="height:2em" ! 5 | align=left | <br/>Robert Goodloe Harper<br /> | | Federalist | nowrap | Jan 29, 1816 âÂÂ<br/>Dec 6, 1816 | Elected to finish term.Resigned.
|- style="height:2em" | colspan=3 | Vacant | nowrap | Dec 6, 1816 âÂÂ<br/>Dec 20, 1816 |
|- style="height:2em" ! rowspan=3 | 6 | rowspan=3 align=left | <br/>Alexander Hanson<br /> | rowspan=3 | Federalist | rowspan=3 nowrap | Dec 20, 1816 âÂÂ<br/>Apr 23, 1819 | rowspan=3 | Elected to finish the vacant term that happened from 1815 to 1816.Died.
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | rowspan=7 | 6 | rowspan=2 | Legislature did not elect until after the term began. | rowspan=2 nowrap | Mar 4, 1819 âÂÂ<br/>Dec 20, 1819 | rowspan=2 colspan=3 | Vacant
|- style="height:2em" | colspan=3 | Vacant | nowrap | Apr 23, 1819 âÂÂ<br/>Dec 21, 1819 |
|- style="height:2em" ! rowspan=2 | 7 | rowspan=2 align=left | <br/>William Pinkney<br /> | rowspan=2 | Democratic-<br/>Republican | rowspan=2 nowrap | Dec 20, 1819 âÂÂ<br/>Feb 25, 1822 | Elected in 1819 to finish the vacant term that happened from 1815 to 1816. | rowspan=5 | Elected late in 1819. | rowspan=6 nowrap | Dec 21, 1819 âÂÂ<br/>Jan 14, 1826 | rowspan=5 | Democratic-<br/>Republican | rowspan=6 align=right | <br/>Edward Lloyd<br /> ! rowspan=6 | 7
|- style="height:2em" | Re-elected in 1821.Died. | rowspan=7 | 7 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | Feb 25, 1822 âÂÂ<br/>Dec 17, 1822 |
|- style="height:2em" ! rowspan=8 | 8 | rowspan=8 align=left | <br/>Samuel Smith<br /> | rowspan=2 | Democratic-<br/>Republican | rowspan=8 nowrap | Dec 17, 1822 âÂÂ<br/>Mar 3, 1833 | rowspan=5 | Elected to finish Pinkney's term.
|- style="height:2em" |
|- style="height:2em" | rowspan=6 | Jacksonian | rowspan=3 | rowspan=5 | 7 | Re-elected in 1825.Resigned. | | Jacksonian
|- style="height:2em" | | nowrap | Jan 14, 1826 âÂÂ<br/>Jan 24, 1826 | colspan=3 | Vacant
|- style="height:2em" | rowspan=3 | Elected to finish Lloyd's term. | rowspan=5 nowrap | Jan 24, 1826 âÂÂ<br/>Dec 20, 1834 | rowspan=5 | National<br/>Republican | rowspan=5 align=right | <br/>Ezekiel F. Chambers<br /> ! rowspan=5 | 8
|- style="height:2em" | rowspan=3 | Re-elected in 1827. | rowspan=3 | 8 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=7 | 8 | rowspan=2 | Re-elected in 1831.Resigned to become judge of the Maryland Court of Appeals.
|- style="height:2em" ! rowspan=7 | 9 | rowspan=7 align=left | <br/>Joseph Kent<br /> | rowspan=6 | National<br/>Republican | rowspan=7 nowrap | Mar 4, 1833 âÂÂ<br/>Nov 24, 1837 | rowspan=7 | Elected in 1833.Died. | rowspan=9 | 9 | rowspan=3
|- style="height:2em" | | nowrap | Dec 20, 1834 âÂÂ<br/>Jan 13, 1835 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Elected to finish Chambers's term.Died. | rowspan=2 nowrap | Jan 13, 1835 âÂÂ<br/>Oct 5, 1836 | rowspan=2 | National<br/>Republican | rowspan=2 align=right | Robert Henry Goldsborough<br /> ! rowspan=2 | 9
|- style="height:2em" | rowspan=3
|- style="height:2em" | | nowrap | Oct 5, 1836 âÂÂ<br/>Dec 31, 1836 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Chambers's term. | rowspan=5 nowrap | Dec 31, 1836 âÂÂ<br/>Oct 24, 1840 | | National<br/>Republican | rowspan=5 align=right | John S. Spence<br /> ! rowspan=5 | 10
|- style="height:2em" | | Whig | rowspan=3 | rowspan=7 | 9 | rowspan=4 | Re-elected in 1837.Died. | rowspan=4 | Whig
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 24, 1837 âÂÂ<br/>Jan 4, 1838 |
|- style="height:2em" ! rowspan=6 | 10 | rowspan=6 align=left | William Duhurst Merrick<br /> | rowspan=6 | Whig | rowspan=6 nowrap | Jan 4, 1838 âÂÂ<br/>Mar 3, 1845 | Elected to finish Kent's term.
|- style="height:2em" | rowspan=5 | Re-elected in 1839. | rowspan=5 | 10 | rowspan=3
|- style="height:2em" | | nowrap | Oct 24, 1840 âÂÂ<br/>Jan 5, 1841 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Elected to finish Spence's term. | rowspan=2 nowrap | Jan 5, 1841 âÂÂ<br/>Mar 3, 1843 | rowspan=2 | Whig | rowspan=2 align=right | <br/>John Leeds Kerr<br /> ! rowspan=2 | 11
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 10 | rowspan=3 | Elected in 1843. | rowspan=13 nowrap | Mar 4, 1843 âÂÂ<br/>Dec 20, 1862 | rowspan=10 | Whig | rowspan=13 align=right | <br/>James Pearce<br /> ! rowspan=13 | 12
|- style="height:2em" ! rowspan=3 | 11 | rowspan=3 align=left | <br/>Reverdy Johnson<br /> | rowspan=3 | Whig | rowspan=3 nowrap | Mar 4, 1845 âÂÂ<br/>Mar 7, 1849 | rowspan=3 | Election year unknown.Resigned to become U.S. Attorney General. | rowspan=6 | 11 |
|- style="height:2em" |
|- style="height:2em" | rowspan=4 | rowspan=6 | 11 | rowspan=6 | Re-elected in 1849.
|- style="height:2em" | colspan=3 | Vacant | nowrap | Mar 7, 1849 âÂÂ<br/>Dec 6, 1849 |
|- style="height:2em" ! 12 | align=left | <br/>David Stewart<br /> | | Democratic | nowrap | Dec 6, 1849 âÂÂ<br/>Jan 12, 1850 | Appointed to continue Johnson's term.Retired when successor elected.
|- style="height:2em" ! rowspan=4 | 13 | rowspan=4 align=left | <br/>Thomas Pratt<br /> | rowspan=4 | Whig | rowspan=4 nowrap | Jan 12, 1850 âÂÂ<br/>Mar 3, 1857 | Elected to finish Johnson's term.
|- style="height:2em" | rowspan=3 | Re-elected in 1851. | rowspan=3 | 12 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 12 | rowspan=3 | Re-elected in 1855.
|- style="height:2em" ! rowspan=5 | 14 | rowspan=5 align=left | <br/>Anthony Kennedy<br /> | rowspan=2 | American | rowspan=5 nowrap | Mar 4, 1857 âÂÂ<br/>Mar 3, 1863 | rowspan=5 | Election year unknown.<br/> | rowspan=5 | 13 | | rowspan=3 | Democratic
|- style="height:2em" |
|- style="height:2em" | rowspan=3 | Union | rowspan=3 | rowspan=7 | 13 | Re-elected in 1860.Died.
|- style="height:2em" | | nowrap | Dec 20, 1862 âÂÂ<br/>Dec 29, 1862 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Appointed to continue Pearce's term.Elected in 1864 to finish Pearce's term.Died. | rowspan=2 nowrap | Dec 29, 1862 âÂÂ<br/>Feb 14, 1865 | rowspan=2 | Union | rowspan=2 align=right | <br/>Thomas Holliday Hicks<br /> ! rowspan=2 | 13
|- style="height:2em" ! rowspan=6 | 15 | rowspan=6 align=left | <br/>Reverdy Johnson<br /> | rowspan=2 | Union | rowspan=6 nowrap | Mar 4, 1863 âÂÂ<br/>Jul 10, 1868 | rowspan=6 | Election year unknown.Resigned to become U.S. Ambassador to the United Kingdom of Great Britain and Ireland. | rowspan=8 | 14 | rowspan=2
|- style="height:2em" | rowspan=2 | | rowspan=2 nowrap | Feb 14, 1865 âÂÂ<br/>Mar 9, 1865 | rowspan=2 colspan=3 | Vacant
|- style="height:2em" | rowspan=4 | Democratic | rowspan=2
|- style="height:2em" | Elected to finish Pearce's term. | nowrap | Mar 9, 1865 âÂÂ<br/>Mar 3, 1867 | | Unconditional Union | rowspan=1 align=right | <br/>John Creswell<br /> ! 14
|- style="height:2em" | rowspan=4 | rowspan=6 | 14 | Philip F. Thomas (D) was elected but failed to qualify due to his support for the Confederacy. | nowrap | Mar 4, 1867 âÂÂ<br/>Mar 7, 1868 | colspan=3 | Vacant
|- style="height:2em" | rowspan=5 | Elected to finish Thomas's term. | rowspan=5 nowrap | Mar 7, 1868 âÂÂ<br/>Mar 3, 1873 | rowspan=5 | Democratic | rowspan=5 align=right | <br/>George Vickers<br /> ! rowspan=5 | 15
|- style="height:2em" | colspan=3 | Vacant | nowrap | Jul 10, 1868 âÂÂ<br/>Jul 13, 1868 |
|- style="height:2em" ! 16 | align=left | <br/>William Whyte<br /> | | Democratic | nowrap | Jul 13, 1868 âÂÂ<br/>Mar 3, 1869 | Appointed to finish Johnson's term.Retired.
|- style="height:2em" ! rowspan=3 | 17 | rowspan=3 align=left | <br/>William T. Hamilton<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Mar 4, 1869 âÂÂ<br/>Mar 3, 1875 | rowspan=3 | Election year unknown.Retired to run for governor. | rowspan=3 | 15 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 15 | rowspan=3 | Election year unknown. | rowspan=3 nowrap | Mar 4, 1873 âÂÂ<br/>Mar 3, 1879 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>George R. Dennis<br /> ! rowspan=3 | 16
|- style="height:2em" ! rowspan=3 | 18 | rowspan=3 align=left | <br/>William Whyte<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Mar 4, 1875 âÂÂ<br/>Mar 3, 1881 | rowspan=3 | Elected in 1874.Retired. | rowspan=3 | 16 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 16 | rowspan=3 | Elected in 1878. | rowspan=3 nowrap | Mar 4, 1879 âÂÂ<br/>Mar 3, 1885 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>James Black Groome<br /> ! rowspan=3 | 17
|- style="height:2em" ! rowspan=11 | 19 | rowspan=11 align=left | <br/>Arthur P. Gorman<br /> | rowspan=11 | Democratic | rowspan=11 nowrap | Mar 4, 1881 âÂÂ<br/>Mar 3, 1899 | rowspan=3 | Elected in 1880. | rowspan=3 | 17 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=4 | 17 | rowspan=3 | Elected in 1884.Re-elected in 1890.Died. | rowspan=3 nowrap | Mar 4, 1885 âÂÂ<br/>Feb 24, 1891 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>Ephraim Wilson<br /> ! rowspan=3 | 18
|- style="height:2em" | rowspan=5 | Re-elected in 1886. | rowspan=5 | 18 |
|- style="height:2em" | rowspan=2
|- style="height:2em" | rowspan=2 | | rowspan=2 nowrap | Feb 24, 1891 âÂÂ<br/>Nov 19, 1891 | rowspan=2 colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | rowspan=4 | 18
|- style="height:2em" | rowspan=3 | Appointed to continue Wilson's term.Elected in 1892 to finish Wilson's term.Unknown if retired or lost re-election. | rowspan=3 nowrap | Nov 19, 1891 âÂÂ<br/>Mar 3, 1897 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>Charles H. Gibson<br /> ! rowspan=3 | 19
|- style="height:2em" | rowspan=3 | Elected in 1892.Lost re-election. | rowspan=3 | 19 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 19 | rowspan=3 | Elected in 1896.Retired. | rowspan=3 nowrap | Mar 4, 1897 âÂÂ<br/>Mar 3, 1903 | rowspan=3 | Republican | rowspan=3 align=right | <br/>George L. Wellington<br /> ! rowspan=3 | 20
|- style="height:2em" ! rowspan=3 | 20 | rowspan=3 align=left | <br/>Louis E. McComas<br /> | rowspan=3 | Republican | rowspan=3 nowrap | Mar 4, 1899 âÂÂ<br/>Mar 3, 1905 | rowspan=3 | Elected in 1898.Retired to become judge of the U.S. Court of Appeals. | rowspan=3 | 20 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=7 | 20 | rowspan=2 | Elected in 1902.Died. | rowspan=2 nowrap | Mar 4, 1903 âÂÂ<br/>Jun 4, 1906 | rowspan=2 | Democratic | rowspan=2 align=right | <br/>Arthur P. Gorman<br /> ! rowspan=2 | 21
|- style="height:2em" ! rowspan=8 | 21 | rowspan=8 align=left | <br/>Isidor Rayner<br /> | rowspan=8 | Democratic | rowspan=8 nowrap | Mar 4, 1905 âÂÂ<br/>Nov 25, 1912 | rowspan=7 | Elected in 1904. | rowspan=7 | 21 | rowspan=3
|- style="height:2em" | | nowrap | Jun 4, 1906 âÂÂ<br/>Jun 8, 1906 | colspan=3 | Vacant
|- style="height:2em" | rowspan=2 | Appointed to continue Gorman's term.Elected in 1908 to finish Gorman's term.Died. | rowspan=2 nowrap | Jun 8, 1906 âÂÂ<br/>Mar 17, 1908 | rowspan=2 | Democratic | rowspan=2 align=right | <br/>William Whyte<br /> ! rowspan=2 | 22
|- style="height:2em" | rowspan=3
|- style="height:2em" | | nowrap | Mar 17, 1908 âÂÂ<br/>Mar 25, 1908 | colspan=3 | Vacant
|- style="height:2em" | Elected to finish Gorman's term, having already been elected to the next term. | rowspan=10 nowrap | Mar 25, 1908 âÂÂ<br/>Mar 3, 1921 | rowspan=10 | Democratic | rowspan=10 align=right | <br/>John Walter Smith<br /> ! rowspan=10 | 23
|- style="height:2em" | | rowspan=6 | 21 | rowspan=6 | Elected in 1908.
|- style="height:2em" | Re-elected in 1910.Died. | rowspan=6 | 22 | rowspan=3
|- style="height:2em" | colspan=3 | Vacant | nowrap | Nov 25, 1912 âÂÂ<br/>Nov 29, 1912 |
|- style="height:2em" ! rowspan=2 | 22 | rowspan=2 align=left | <br/>William P. Jackson<br /> | rowspan=2 | Republican | rowspan=2 nowrap | Nov 29, 1912 âÂÂ<br/>Jan 28, 1914 | rowspan=2 | Appointed to continue Rayner's term.Retired when successor elected.
|- style="height:2em" | rowspan=2
|- style="height:2em" ! rowspan=2 | 23 | rowspan=2 align=left | <br/>Blair Lee<br /> | rowspan=2 | Democratic | rowspan=2 nowrap | Jan 28, 1914 âÂÂ<br/>Mar 3, 1917 | rowspan=2 | Elected in 1913 to finish Rayner's term.Lost re-election.
|- style="height:2em" | | rowspan=3 | 22 | rowspan=3 | Re-elected in 1914.Lost re-election.
|- style="height:2em" ! rowspan=3 | 24 | rowspan=3 align=left | <br/>Joseph I. France<br /> | rowspan=3 | Republican | rowspan=3 nowrap | Mar 4, 1917 âÂÂ<br/>Mar 3, 1923 | rowspan=3 | Elected in 1916.Lost re-election. | rowspan=3 | 23 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 23 | rowspan=3 | Elected in 1920.Lost re-election. | rowspan=3 nowrap | Mar 4, 1921 âÂÂ<br/>Mar 3, 1927 | rowspan=3 | Republican | rowspan=3 align=right | <br/>Ovington Weller<br /> ! rowspan=3 | 24
|- style="height:2em" ! rowspan=3 | 25 | rowspan=3 align=left | <br/>William Cabell Bruce<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Mar 4, 1923 âÂÂ<br/>Mar 3, 1929 | rowspan=3 | Elected in 1922.Lost re-election. | rowspan=3 | 24 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 24 | rowspan=3 | Elected in 1926. | rowspan=12 nowrap | Mar 4, 1927 âÂÂ<br/>Jan 3, 1951 | rowspan=12 | Democratic | rowspan=12 align=right | <br/>Millard Tydings<br /> ! rowspan=12 | 25
|- style="height:2em" ! rowspan=3 | 26 | rowspan=3 align=left | <br/>Phillips Lee Goldsborough<br /> | rowspan=3 | Republican | rowspan=3 nowrap | Mar 4, 1929 âÂÂ<br/>Jan 3, 1935 | rowspan=3 | Elected in 1928.Retired to run for governor. | rowspan=3 | 25 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 25 | rowspan=3 | Re-elected in 1932.
|- style="height:2em" ! rowspan=6 | 27 | rowspan=6 align=left | <br/>George L. P. Radcliffe<br /> | rowspan=6 | Democratic | rowspan=6 nowrap | Jan 3, 1935 âÂÂ<br/>Jan 3, 1947 | rowspan=3 | Elected in 1934. | rowspan=3 | 26 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 26 | rowspan=3 | Re-elected in 1938.
|- style="height:2em" | rowspan=3 | Re-elected in 1940.Lost renomination. | rowspan=3 | 27 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 27 | rowspan=3 | Re-elected in 1944.Lost re-election.
|- style="height:2em" ! rowspan=3 | 28 | rowspan=3 align=left | <br/>Herbert O'Conor<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Jan 3, 1947 âÂÂ<br/>Jan 3, 1953 | rowspan=3 | Elected in 1946.Retired. | rowspan=3 | 28 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 28 | rowspan=3 | Elected in 1950. | rowspan=6 nowrap | Jan 3, 1951 âÂÂ<br/>Jan 3, 1963 | rowspan=6 | Republican | rowspan=6 align=right | <br/>John Marshall Butler<br /> ! rowspan=6 | 26
|- style="height:2em" ! rowspan=6 | 29 | rowspan=6 align=left | <br/>J. Glenn Beall<br /> | rowspan=6 | Republican | rowspan=6 nowrap | Jan 3, 1953 âÂÂ<br/>Jan 3, 1965 | rowspan=3 | Elected in 1952. | rowspan=3 | 29 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 29 | rowspan=3 | Re-elected in 1956.Retired.
|- style="height:2em" | rowspan=3 | Re-elected in 1958.Lost re-election. | rowspan=3 | 30 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 30 | rowspan=3 | Elected in 1962.Lost re-election. | rowspan=3 nowrap | Jan 3, 1963 âÂÂ<br/>Jan 3, 1969 | rowspan=3 | Democratic | rowspan=3 align=right | <br/>Daniel Brewster<br /> ! rowspan=3 | 27
|- style="height:2em" ! rowspan=3 | 30 | rowspan=3 align=left | <br/>Joseph Tydings<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Jan 3, 1965 âÂÂ<br/>Jan 3, 1971 | rowspan=3 | Elected in 1964.Lost re-election. | rowspan=3 | 31 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 31 | rowspan=3 | Elected in 1968. | rowspan=9 nowrap | Jan 3, 1969 âÂÂ<br/>Jan 3, 1987 | rowspan=9 | Republican | rowspan=9 align=right | <br/>Charles Mathias<br /> ! rowspan=9 | 28
|- style="height:2em" ! rowspan=3 | 31 | rowspan=3 align=left | <br/>J. Glenn Beall Jr.<br /> | rowspan=3 | Republican | rowspan=3 nowrap | Jan 3, 1971 âÂÂ<br/>Jan 3, 1977 | rowspan=3 | Elected in 1970.Lost re-election. | rowspan=3 | 32 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 32 | rowspan=3 | Re-elected in 1974.
|- style="height:2em" ! rowspan=15 | 32 | rowspan=15 align=left | <br/>Paul Sarbanes<br /> | rowspan=15 | Democratic | rowspan=15 nowrap | Jan 3, 1977 âÂÂ<br/>Jan 3, 2007 | rowspan=3 | Elected in 1976. | rowspan=3 | 33 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 33 | rowspan=3 | Re-elected in 1980.Retired.
|- style="height:2em" | rowspan=3 | Re-elected in 1982. | rowspan=3 | 34 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 34 | rowspan=3 | Elected in 1986. | rowspan=15 nowrap | Jan 3, 1987 âÂÂ<br/>Jan 3, 2017 | rowspan=15 | Democratic | rowspan=15 align=right | <br/>Barbara Mikulski<br /> ! rowspan=15 | 29
|- style="height:2em" | rowspan=3 | Re-elected in 1988. | rowspan=3 | 35 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 35 | rowspan=3 | Re-elected in 1992.
|- style="height:2em" | rowspan=3 | Re-elected in 1994. | rowspan=3 | 36 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 36 | rowspan=3 | Re-elected in 1998.
|- style="height:2em" | rowspan=3 | Re-elected in 2000.Retired. | rowspan=3 | 37 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 37 | rowspan=3 | Re-elected in 2004.
|- style="height:2em" ! rowspan=9 | 33 | rowspan=9 align=left | <br/>Ben Cardin<br /> | rowspan=9 | Democratic | rowspan=9 nowrap | Jan 3, 2007 âÂÂ<br/>Jan 3, 2025 | rowspan=3 | Elected in 2006. | rowspan=3 | 38 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 38 | rowspan=3 | Re-elected in 2010.Retired.
|- style="height:2em" | rowspan=3 | Re-elected in 2012. | rowspan=3 | 39 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 39 | rowspan=3 | Elected in 2016. | rowspan=6 nowrap | Jan 3, 2017 âÂÂ<br/>present | rowspan=6 | Democratic | rowspan=6 align=right | <br/>Chris Van Hollen<br /> ! rowspan=6 | 30
|- style="height:2em" | rowspan=3 | Re-elected in 2018.Retired. | rowspan=3 | 40 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=3 | 40 | rowspan=3 | Re-elected in 2022.
|- style="height:2em" ! rowspan=3 | 34 | rowspan=3 align=left | <br/>Angela Alsobrooks<br /> | rowspan=3 | Democratic | rowspan=3 nowrap | Jan 3, 2025 âÂÂ<br/>present | rowspan=3| Elected in 2024. | rowspan=3| 41 |
|- style="height:2em" |
|- style="height:2em" | | rowspan=2 | 41 | rowspan=2 colspan=5 | To be determined in the 2028 election.
|- style="height:2em" | colspan=5 | To be determined in the 2030 election. | 42 |