New Hampshire's 21st State Senate district is one of 24 districts in the New Hampshire Senate. It has been represented by Democrat Rebecca Perkins Kwoka since 2020, succeeding fellow Democrat Martha Fuller Clark.
District 21 covers parts of eastern Rockingham and southern Strafford Counties. The district is located entirely within New Hampshire's 1st congressional district. It borders the state of Maine.
Rockingham County - 11% of county
Strafford County - 17% of county
Results are of elections held under 2022 district lines.
The following result occurred prior to 2022 redistricting, and thus were held under different district lines.