U.S. Senate elections in Delaware
Elections won
R 17 · D 2138 Senate elections since 1916
Last decided by
17.1 pts2024, Lisa Blunt Rochester over Eric Hansen
Closest ever
0.43 pts1922, Thomas F. Bayard Jr. over Coleman Du Pont
Longest streak
11 in a rowDemocratic, 1996–2024
Next election
2026Tuesday, November 3, 2026
Delaware's U.S. Senate seats are held by Democrat Christopher A. Coons and Democrat Lisa Blunt Rochester; Rochester won the most recent race by 17.1 points in 2024. Coons has held one seat since 2010 and Rochester the other since 2024. The 2024 race put Rochester ahead of Eric Hansen, 17.1 points clear. Across 38 elections since 1916, Republicans have won 17 and Democrats 21. Of those, the closest was 1922, decided by 0.43 points; the widest 2006, by 41.5 points.
Christopher A. Coons D 291,804 · Lauren Witzke R 186,054 · Mark W. Turley I 7,833 · Nadine M. Frost L 5,244
Thomas R. Carper D 217,385 · Robert B Arlett R 137,127 · Demitri G Theodoropoulos G 4,170 · Nadine M. Frost L 3,910
Thomas R. Carper D 265,415 · Kevin Wade R 115,700 · Alexander Pires I 15,300 · Andrew Richard Groff G 3,191
Christopher A. Coons D 174,012 · Christine O'Donnell R 123,053 · Glenn A. Miller I 8,201 · James W. Rash L 2,101
Joe Biden D 257,539 · Christine O'Donnell R 140,595
Joe Biden D 135,253 · Raymond J. Clatworthy R 94,793 · Maurice Barros I 996 · Raymond T. Buranello L 922 · +1 more
Thomas R. Carper D 181,566 · William V Roth Jr. R 142,891 · J. Burke Morrison L 1,103 · Mark E. Dankof C 1,044 · +1 more
Joe Biden D 165,465 · Raymond J. Clatworthy R 105,088 · Mark Jones L 3,340 · Jacqueline Kossoff N 1,698
William V Roth Jr. R 151,115 · S. B. Woo D 92,378
Joe Biden D 147,831 · John M. Burris R 98,101
William V Roth Jr. R 105,357 · David N. Levinson D 84,413 · Lawrence D. Sullivan L 653 · Charles A. Baker A 537
William V Roth Jr. R 125,454 · Thomas C. Maloney D 98,042 · Donald G. Gies A 646 · Joseph F. McInerney 437 · +1 more
J. Caleb Boggs R 97,268 · James M. Tunnell D 67,263
J. Caleb Boggs R 98,874 · J. Allen Frear D 96,090
John J. Williams R 82,280 · Elbert N. Carvel D 72,152
J. Allen Frear D 82,511 · Herbert B. Washburton R 62,389
John J. Williams R 93,020 · Alexis I. Bayard D 77,685
J. Allen Frear D 71,888 · C. Douglas. Buck R 68,246 · Hamilton D. Ware P 681 · Thomas J. Sard P 467 · +1 more
John J. Williams R 62,603 · James M. Tunnell D 50,910
James H. Hughes D 67,136 · Daniel O. Hastings R 52,469 · Robert G. Houston I 6,897 · Charles W. Perry S 183 · +1 more
John G. Townsend Jr. R 52,829 · Wilbur L. Adams D 45,771 · Fred W. Whiteside S 497 · John T. Wlodkoski C 69
John G. Townsend Jr. R 63,725 · Thomas F. Bayard Jr. D 40,828
Coleman Du Pont R 52,731 · James M. Tunnell D 36,085
Josiah O. Wolcott D 25,434 · Henry A. Du Pont R 22,925 · Hiram A. Burton P 2,361 · Wiliiam C. Ferris S 490