| County | Margin | Kelly Votes | Protasiewicz Votes | Total Votes |
|---|---|---|---|---|
| Adams | R+19.0 | 2159 | 1469 | 3628 |
| Ashland | D+30.8 | 884 | 1671 | 2555 |
| Barron | R+18.2 | 3736 | 2586 | 6322 |
| Bayfield | D+33.5 | 1308 | 2627 | 3935 |
| Brown | R+8.7 | 27370 | 22974 | 50344 |
| Buffalo | R+15.7 | 1037 | 756 | 1793 |
| Burnett | R+23.3 | 1340 | 834 | 2174 |
| Calumet | R+19.9 | 5606 | 3748 | 9354 |
| Chippewa | R+11.8 | 5040 | 3976 | 9016 |
| Clark | R+30.0 | 2540 | 1369 | 3909 |
| Columbia | D+5.0 | 5553 | 6143 | 11696 |
| Crawford | D+9.8 | 1157 | 1408 | 2565 |
| Dane | D+63 | 32586 | 143341 | 175927 |
| Dodge | R+31.8 | 9991 | 5173 | 15164 |
| Door | D+9.3 | 3599 | 4337 | 7936 |
| Douglas | D+20.5 | 2652 | 4018 | 6670 |
| Dunn | D+2.5 | 2955 | 3104 | 6059 |
| Eau Claire | D+26.7 | 6678 | 11534 | 18212 |
| Florence | R+40.0 | 603 | 258 | 861 |
| Fond Du Lac | R+29.4 | 11645 | 6353 | 17998 |
| Forest | R+32.2 | 823 | 423 | 1246 |
| Grant | R+0.6 | 3738 | 3692 | 7430 |
| Green | D+14.5 | 3114 | 4172 | 7286 |
| Green Lake | R+31.4 | 2191 | 1144 | 3335 |
| Iowa | D+27.5 | 1890 | 3326 | 5216 |
| Iron | R+2.6 | 587 | 557 | 1144 |
| Jackson | R+0.4 | 1229 | 1218 | 2447 |
| Jefferson | R+11.4 | 8831 | 7021 | 15852 |
| Juneau | R+17.0 | 2195 | 1555 | 3750 |
| Kenosha | R+1.3 | 14686 | 14304 | 28990 |
| Kewaunee | R+29.1 | 2336 | 1282 | 3618 |
| La Crosse | D+23 | 8549 | 13648 | 22197 |
| Lafayette | R+2.2 | 1296 | 1240 | 2536 |
| Langlade | R+31.2 | 2091 | 1097 | 3188 |
| Lincoln | R+19.6 | 2833 | 1906 | 4739 |
| Manitowoc | R+24.2 | 9024 | 5503 | 14527 |
| Maratdon | R+17.3 | 15160 | 10682 | 25842 |
| Marinette | R+32.9 | 4715 | 2378 | 7093 |
| Marquette | R+26.2 | 1861 | 1088 | 2949 |
| Menominee | D+11.5 | 97 | 122 | 219 |
| Milwaukee | D+37.8 | 55289 | 122425 | 177714 |
| Monroe | R+14.1 | 3463 | 2608 | 6071 |
| Oconto | R+37.8 | 4878 | 2202 | 7080 |
| Oneida | R+11.8 | 4690 | 3700 | 8390 |
| Outagamie | R+7.1 | 19009 | 16484 | 35493 |
| Ozaukee | R+8.3 | 15360 | 13007 | 28367 |
| Pepin | R+12.7 | 535 | 415 | 950 |
| Pierce | D+7.3 | 2382 | 2754 | 5136 |
| Polk | R+18.6 | 3500 | 2403 | 5903 |
| Portage | D+10.9 | 6620 | 8242 | 14862 |
| Price | R+18.4 | 1482 | 1022 | 2504 |
| Racine | R+13.0 | 21252 | 16352 | 37604 |
| Richland | D+6.3 | 1267 | 1437 | 2704 |
| Rock | D+20 | 10352 | 15530 | 25882 |
| Rusk | R+25.4 | 1352 | 804 | 2156 |
| St. Croix | R+2.4 | 6734 | 6412 | 13146 |
| Sauk | D+12.0 | 5880 | 7482 | 13362 |
| Sawyer | R+9.3 | 1593 | 1322 | 2915 |
| Shawano | R+34.6 | 4129 | 2007 | 6136 |
| Sheboygan | R+20.7 | 14835 | 9743 | 24578 |
| Taylor | R+44.7 | 2268 | 868 | 3136 |
| Trempealeau | R+1.0 | 1821 | 1786 | 3607 |
| Vernon | D+7.4 | 2333 | 2704 | 5037 |
| Vilas | R+18.1 | 3208 | 2226 | 5434 |
| Walwortd | R+18.8 | 11645 | 7962 | 19607 |
| Washburn | R+14.9 | 1471 | 1090 | 2561 |
| Washington | R+35.3 | 24285 | 11611 | 35896 |
| Waukesha | R+22.9 | 74581 | 46835 | 121416 |
| Waupaca | R+25.6 | 5298 | 3137 | 8435 |
| Waushara | R+34.6 | 2893 | 1405 | 4298 |
| Winnebago | R+1.8 | 15649 | 15085 | 30734 |
| Wood | R+14.9 | 8551 | 6333 | 14884 |