2018 Wisconsin State Senate election
# 2018 Wisconsin State Senate election

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vte :

An election was held on November 6, 2018 to elect 17 of the 33 members of Wisconsin's State Senate. The election coincided with elections for other offices, including U.S. Senate, U.S. House of Representatives, Governor and State Assembly. The primary election was held on August 14, 2018.

Republicans maintained control of the Senate, winning 11 seats compared to 6 seats for the Democrats.

## Results

### Statewide

Statewide results of the 2018 Wisconsin State Senate election:

| Party | Party | Candi- dates | Votes | Votes | Seats | Seats | Seats |
| - | - | - | - | - | - | - | - |
| Party | Party | Candi- dates | No. | % | No. | +/– | % |
| | Republican Party | 15 | 675,016 | 52.31% | 11 | 1 | 64.71% |
| | Democratic Party | 15 | 605,142 | 46.90% | 6 | 1 | 35.29% |
| | Independent | 1 | 1,776 | 0.14% | 0 | | 0.00% |
| | Write-in | 2 | 57 | 0.00% | 0 | | 0.00% |
| | Scattering | | 8,346 | 0.65% | 0 | | 0.00% |
| Total | Total | 33 | 1,290,337 | 100.00% | 17 | | 100.00% |

Popular vote

Republican

52.31%

Democratic

46.90%

Other

0.79% :

House seats

Republican

64.71%

Democratic

35.29% :

### Close races

Seats where the margin of victory was under 10%:

* State Senate district 25, 2.14%
* State Senate district 5, 2.4%
* State Senate district 31, 5.66%
* State Senate district 19, 6.5%
* State Senate district 17, 8.24%
* State Senate district 1, 9.08% (gain)

### District

Results of the 2018 Wisconsin State Senate election by district:

| District | Democratic | Democratic | Republican | Republican | Others | Others | Total | Result |
| - | - | - | - | - | - | - | - | - |
| District | Votes | % | Votes | % | Votes | % | Votes | Result |
| District 1 | 39,414 | 45.42% | 47,289 | 54.50% | 65 | 0.07% | 86,768 | Republican Gain |
| District 3 | 36,875 | 97.40% | - | - | 985 | 2.60% | 37,860 | Democratic Hold |
| District 5 | 45,591 | 48.75% | 47,836 | 51.15% | 102 | 0.11% | 93,529 | Republican Hold |
| District 7 | 56,198 | 66.25% | 28,459 | 33.55% | 165 | 0.19% | 84,822 | Democratic Hold |
| District 9 | 31,684 | 41.47% | 44,680 | 58.47% | 45 | 0.06% | 76,409 | Republican Hold |
| District 11 | - | - | 59,512 | 95.89% | 2,554 | 4.11% | 62,066 | Republican Hold |
| District 13 | 34,385 | 40.90% | 49,668 | 59.07% | 24 | 0.03% | 84,077 | Republican Hold |
| District 15 | 54,381 | 96.53% | - | - | 1,952 | 3.47% | 56,333 | Democratic Hold |
| District 17 | 31,757 | 45.86% | 37,465 | 54.10% | 26 | 0.04% | 69,248 | Republican Hold |
| District 19 | 38,179 | 46.73% | 43,493 | 53.23% | 29 | 0.04% | 81,701 | Republican Hold |
| District 21 | 35,111 | 41.91% | 48,603 | 58.01% | 69 | 0.08% | 83,783 | Republican Hold |
| District 23 | 29,637 | 40.82% | 42,958 | 59.17% | 11 | 0.02% | 72,606 | Republican Hold |
| District 25 | 39,624 | 51.06% | 37,960 | 48.92% | 20 | 0.03% | 77,604 | Democratic Hold |
| District 27 | 64,606 | 66.16% | 32,993 | 33.79% | 54 | 0.06% | 97,653 | Democratic Hold |
| District 29 | 27,627 | 35.73% | 49,657 | 64.22% | 41 | 0.05% | 77,325 | Republican Hold |
| District 31 | 40,073 | 51.67% | 35,684 | 46.01% | 1,804 | 2.33% | 77,561 | Democratic Hold |
| District 33 | - | - | 68,759 | 96.85% | 2,233 | 3.15% | 70,992 | Republican Hold |
| Total | 605,142 | 46.90% | 675,016 | 52.31% | 10,179 | 0.79% | 1,290,337 | |
