Elections › Tuesday, November 3, 2020
General election
U.S. Senate
Tuesday, November 3, 2020 · 100% reporting · Past races for this seat
Results
- Joni Ernst R RepublicanWinner864,99751.7%
- Theresa Greenfield D Democratic754,85945.1%
- Rick Stewart L Libertarian36,9612.2%
- Suzanne Herzog I Independent13,8000.8%
By county
County-by-county numbers (99 counties)
| County | Joni Ernst | Theresa Greenfield | Rick Stewart | Suzanne Herzog | Reporting |
|---|---|---|---|---|---|
| Adair | 2,809 (67.8%) | 1,207 (29.1%) | 89 (2.1%) | 36 (0.9%) | 100% |
| Adams | 1,497 (69.4%) | 594 (27.6%) | 46 (2.1%) | 19 (0.9%) | 100% |
| Allamakee | 4,478 (61.0%) | 2,602 (35.5%) | 175 (2.4%) | 80 (1.1%) | 100% |
| Appanoose | 4,189 (65.6%) | 1,956 (30.6%) | 168 (2.6%) | 71 (1.1%) | 100% |
| Audubon | 2,188 (64.9%) | 1,092 (32.4%) | 70 (2.1%) | 21 (0.6%) | 100% |
| Benton | 8,830 (61.0%) | 5,202 (35.9%) | 331 (2.3%) | 120 (0.8%) | 100% |
| Black Hawk | 29,222 (44.3%) | 34,963 (53.0%) | 1,301 (2.0%) | 490 (0.7%) | 100% |
| Boone | 8,315 (54.8%) | 6,316 (41.6%) | 385 (2.5%) | 167 (1.1%) | 100% |
| Bremer | 8,196 (56.7%) | 5,911 (40.9%) | 254 (1.8%) | 84 (0.6%) | 100% |
| Buchanan | 6,063 (56.7%) | 4,292 (40.1%) | 248 (2.3%) | 96 (0.9%) | 100% |
| Buena Vista | 4,724 (59.1%) | 3,022 (37.8%) | 166 (2.1%) | 75 (0.9%) | 100% |
| Butler | 5,291 (66.1%) | 2,474 (30.9%) | 173 (2.2%) | 69 (0.9%) | 100% |
| Calhoun | 3,513 (67.5%) | 1,531 (29.4%) | 129 (2.5%) | 32 (0.6%) | 100% |
| Carroll | 7,245 (65.0%) | 3,580 (32.1%) | 230 (2.1%) | 96 (0.9%) | 100% |
| Cass | 4,725 (66.0%) | 2,259 (31.6%) | 120 (1.7%) | 54 (0.8%) | 100% |
| Cedar | 5,935 (56.3%) | 4,300 (40.8%) | 226 (2.1%) | 74 (0.7%) | 100% |
| Cerro Gordo | 11,339 (48.2%) | 11,534 (49.0%) | 430 (1.8%) | 211 (0.9%) | 100% |
| Cherokee | 4,214 (65.6%) | 2,002 (31.2%) | 138 (2.1%) | 67 (1.0%) | 100% |
| Chickasaw | 4,024 (61.2%) | 2,324 (35.3%) | 159 (2.4%) | 71 (1.1%) | 100% |
| Clarke | 2,906 (63.1%) | 1,520 (33.0%) | 119 (2.6%) | 60 (1.3%) | 100% |
| Clay | 5,716 (64.5%) | 2,861 (32.3%) | 193 (2.2%) | 89 (1.0%) | 100% |
| Clayton | 5,845 (61.4%) | 3,434 (36.1%) | 157 (1.6%) | 82 (0.9%) | 100% |
| Clinton | 12,559 (51.6%) | 10,942 (45.0%) | 635 (2.6%) | 200 (0.8%) | 100% |
| Crawford | 4,424 (63.2%) | 2,336 (33.4%) | 160 (2.3%) | 80 (1.1%) | 100% |
| Dallas | 28,727 (51.7%) | 25,427 (45.8%) | 1,006 (1.8%) | 381 (0.7%) | 100% |
| Davis | 2,728 (67.5%) | 1,167 (28.9%) | 112 (2.8%) | 32 (0.8%) | 100% |
| Decatur | 2,439 (65.3%) | 1,165 (31.2%) | 90 (2.4%) | 43 (1.1%) | 100% |
| Delaware | 6,454 (65.0%) | 3,235 (32.6%) | 172 (1.7%) | 71 (0.7%) | 100% |
| Des Moines | 9,468 (48.3%) | 9,296 (47.5%) | 591 (3.0%) | 232 (1.2%) | 100% |
| Dickinson | 7,149 (63.9%) | 3,791 (33.9%) | 174 (1.6%) | 66 (0.6%) | 100% |
| Dubuque | 26,034 (49.1%) | 25,433 (48.0%) | 1,148 (2.2%) | 428 (0.8%) | 100% |
| Emmet | 2,965 (61.8%) | 1,637 (34.1%) | 147 (3.1%) | 47 (1.0%) | 100% |
| Fayette | 5,865 (58.1%) | 3,912 (38.8%) | 229 (2.3%) | 89 (0.9%) | 100% |
| Floyd | 4,181 (52.5%) | 3,498 (43.9%) | 187 (2.4%) | 98 (1.2%) | 100% |
| Franklin | 3,270 (64.6%) | 1,639 (32.4%) | 100 (2.0%) | 50 (1.0%) | 100% |
| Fremont | 2,563 (67.3%) | 1,099 (28.9%) | 89 (2.3%) | 56 (1.5%) | 100% |
| Greene | 3,063 (61.4%) | 1,784 (35.8%) | 104 (2.1%) | 39 (0.8%) | 100% |
| Grundy | 4,900 (67.9%) | 2,120 (29.4%) | 154 (2.1%) | 38 (0.5%) | 100% |
| Guthrie | 4,103 (64.9%) | 2,000 (31.6%) | 162 (2.6%) | 56 (0.9%) | 100% |
| Hamilton | 4,679 (59.5%) | 2,913 (37.0%) | 190 (2.4%) | 84 (1.1%) | 100% |
| Hancock | 4,004 (65.9%) | 1,881 (31.0%) | 130 (2.1%) | 60 (1.0%) | 100% |
| Hardin | 5,639 (63.8%) | 2,920 (33.0%) | 195 (2.2%) | 84 (0.9%) | 100% |
| Harrison | 5,059 (63.2%) | 2,574 (32.2%) | 253 (3.2%) | 118 (1.5%) | 100% |
| Henry | 5,875 (60.2%) | 3,457 (35.4%) | 310 (3.2%) | 116 (1.2%) | 100% |
| Howard | 2,716 (55.4%) | 2,014 (41.0%) | 118 (2.4%) | 58 (1.2%) | 100% |
| Humboldt | 3,671 (69.8%) | 1,443 (27.4%) | 108 (2.0%) | 40 (0.8%) | 100% |
| Ida | 2,757 (72.3%) | 964 (25.3%) | 66 (1.7%) | 28 (0.7%) | 100% |
| Iowa | 5,794 (60.2%) | 3,541 (36.8%) | 205 (2.1%) | 84 (0.9%) | 100% |
| Jackson | 6,175 (56.6%) | 4,249 (39.0%) | 366 (3.4%) | 118 (1.1%) | 100% |
| Jasper | 11,405 (57.0%) | 7,905 (39.5%) | 531 (2.6%) | 167 (0.8%) | 100% |
| Jefferson | 4,008 (45.6%) | 4,547 (51.7%) | 163 (1.9%) | 80 (0.9%) | 100% |
| Johnson | 23,773 (28.8%) | 57,063 (69.1%) | 1,382 (1.7%) | 373 (0.5%) | 100% |
| Jones | 6,320 (58.0%) | 4,237 (38.9%) | 273 (2.5%) | 68 (0.6%) | 100% |
| Keokuk | 3,565 (68.5%) | 1,489 (28.6%) | 101 (1.9%) | 53 (1.0%) | 100% |
| Kossuth | 5,957 (66.1%) | 2,799 (31.1%) | 193 (2.1%) | 57 (0.6%) | 100% |
| Lee | 8,489 (51.3%) | 7,445 (45.0%) | 485 (2.9%) | 122 (0.7%) | 100% |
| Linn | 53,248 (42.1%) | 69,125 (54.7%) | 3,188 (2.5%) | 815 (0.6%) | 100% |
| Louisa | 3,259 (62.0%) | 1,804 (34.3%) | 141 (2.7%) | 51 (1.0%) | 100% |
| Lucas | 3,105 (68.4%) | 1,302 (28.7%) | 99 (2.2%) | 36 (0.8%) | 100% |
| Lyon | 5,522 (81.8%) | 1,073 (15.9%) | 104 (1.5%) | 50 (0.7%) | 100% |
| Madison | 6,245 (64.3%) | 3,168 (32.6%) | 218 (2.2%) | 86 (0.9%) | 100% |
| Mahaska | 7,860 (70.0%) | 2,969 (26.5%) | 273 (2.4%) | 118 (1.1%) | 100% |
| Marion | 12,211 (64.1%) | 6,269 (32.9%) | 423 (2.2%) | 144 (0.8%) | 100% |
| Marshall | 9,057 (50.7%) | 8,187 (45.9%) | 442 (2.5%) | 165 (0.9%) | 100% |
| Mills | 5,347 (65.6%) | 2,544 (31.2%) | 177 (2.2%) | 82 (1.0%) | 100% |
| Mitchell | 3,347 (57.7%) | 2,282 (39.3%) | 124 (2.1%) | 49 (0.8%) | 100% |
| Monona | 3,054 (65.6%) | 1,455 (31.3%) | 108 (2.3%) | 39 (0.8%) | 100% |
| Monroe | 2,742 (68.4%) | 1,148 (28.6%) | 84 (2.1%) | 34 (0.8%) | 100% |
| Montgomery | 3,633 (68.6%) | 1,520 (28.7%) | 98 (1.9%) | 46 (0.9%) | 100% |
| Muscatine | 10,278 (50.3%) | 9,381 (45.9%) | 570 (2.8%) | 199 (1.0%) | 100% |
| O'Brien | 5,675 (76.1%) | 1,640 (22.0%) | 105 (1.4%) | 38 (0.5%) | 100% |
| Osceola | 2,525 (77.4%) | 657 (20.1%) | 49 (1.5%) | 31 (0.9%) | 100% |
| Page | 5,152 (69.3%) | 2,067 (27.8%) | 138 (1.9%) | 78 (1.1%) | 100% |
| Palo Alto | 3,113 (63.1%) | 1,677 (34.0%) | 106 (2.1%) | 36 (0.7%) | 100% |
| Plymouth | 10,145 (72.3%) | 3,587 (25.6%) | 219 (1.6%) | 77 (0.6%) | 100% |
| Pocahontas | 2,641 (70.0%) | 1,003 (26.6%) | 91 (2.4%) | 39 (1.0%) | 100% |
| Polk | 106,443 (41.6%) | 142,328 (55.6%) | 5,313 (2.1%) | 1,985 (0.8%) | 100% |
| Pottawattamie | 24,720 (54.9%) | 18,520 (41.1%) | 1,269 (2.8%) | 524 (1.2%) | 100% |
| Poweshiek | 5,361 (53.4%) | 4,381 (43.7%) | 202 (2.0%) | 91 (0.9%) | 100% |
| Ringgold | 1,870 (69.4%) | 732 (27.2%) | 75 (2.8%) | 16 (0.6%) | 100% |
| Sac | 3,849 (70.3%) | 1,440 (26.3%) | 129 (2.4%) | 60 (1.1%) | 100% |
| Scott | 42,941 (46.9%) | 45,751 (50.0%) | 2,139 (2.3%) | 709 (0.8%) | 100% |
| Shelby | 4,489 (67.1%) | 1,989 (29.7%) | 156 (2.3%) | 57 (0.8%) | 100% |
| Sioux | 15,785 (83.6%) | 2,828 (15.0%) | 192 (1.0%) | 81 (0.4%) | 100% |
| Story | 20,750 (41.1%) | 28,216 (55.9%) | 1,133 (2.2%) | 370 (0.7%) | 100% |
| Tama | 5,090 (56.8%) | 3,588 (40.0%) | 205 (2.3%) | 79 (0.9%) | 100% |
| Taylor | 2,337 (72.8%) | 762 (23.7%) | 83 (2.6%) | 28 (0.9%) | 100% |
| Union | 3,820 (62.4%) | 2,051 (33.5%) | 172 (2.8%) | 76 (1.2%) | 100% |
| Van Buren | 2,583 (68.9%) | 1,065 (28.4%) | 75 (2.0%) | 28 (0.8%) | 100% |
| Wapello | 8,464 (55.2%) | 6,344 (41.4%) | 394 (2.6%) | 132 (0.9%) | 100% |
| Warren | 17,276 (56.3%) | 12,478 (40.7%) | 692 (2.3%) | 234 (0.8%) | 100% |
| Washington | 6,773 (58.1%) | 4,519 (38.8%) | 262 (2.3%) | 95 (0.8%) | 100% |
| Wayne | 2,186 (71.7%) | 784 (25.7%) | 53 (1.7%) | 28 (0.9%) | 100% |
| Webster | 10,195 (57.9%) | 6,845 (38.9%) | 403 (2.3%) | 173 (1.0%) | 100% |
| Winnebago | 3,336 (56.3%) | 2,361 (39.9%) | 153 (2.6%) | 72 (1.2%) | 100% |
| Winneshiek | 6,039 (50.5%) | 5,581 (46.7%) | 218 (1.8%) | 118 (1.0%) | 100% |
| Woodbury | 24,175 (54.4%) | 18,674 (42.0%) | 994 (2.2%) | 629 (1.4%) | 100% |
| Worth | 2,425 (55.5%) | 1,803 (41.2%) | 98 (2.2%) | 46 (1.1%) | 100% |
| Wright | 3,889 (62.9%) | 2,063 (33.4%) | 158 (2.5%) | 76 (1.2%) | 100% |
Campaign money · 2019–2020 cycle
| Candidate | Raised | Spent | Cash on hand |
|---|---|---|---|
| Joni Ernst | $30,567,997 | $30,265,789 | $528,415 |
| Theresa Greenfield | $56,358,302 | $56,328,076 | $30,236 |
| Rick Stewart | $8,820 | $16,093 | -$7,273 |
| Suzanne Herzog | $18,300 | $18,300 | $0 |
Totals for the two-year cycle from each campaign's own reports. Names are matched across sources, so double-check against the original filing.
Other races for this seat in 2020
- U.S. Senate · Democratic primary · June 2, 2020
- U.S. Senate · Republican primary · June 2, 2020
Races and results: civicAPI and the Iowa Secretary of State. State campaign finance: summary totals from reports filed with the Iowa Ethics & Campaign Disclosure Board. Federal: the Federal Election Commission.