Donations made to political groups or candidates must be disclosed under state law for greater transparency in elections. While Congress created the Federal Election Commission to oversee federal elections in 1974, each state is left to regulate its local elections.
Top committees ranked by total contributions (September 2021)
| Rank | Committee | Amount | Median contribution amount |
|---|---|---|---|
| 1 | People for Rebecca | $1,260,775 | $50 |
| 2 | Tony for Wisconsin | $899,442 | $25 |
| 3 | Democratic Party of Wisconsin | $660,616 | $25 |
| 4 | Committee to Elect a Republican Senate | $97,984 | $35 |
| 5 | Kaul for Attorney General | $89,128 | $50 |
| 6 | Friends of Devin LeMahieu | $50,035 | $100 |
| 7 | State Senate Democratic Committee | $42,793 | $25 |
| 8 | Citizens for Dale Kooyenga | $33,444 | $250 |
| 9 | Assembly Democratic Campaign Committee | $32,928 | $25 |
| 10 | Taxpayers for Marklein | $30,805 | $125 |
| 11 | REALTORS Political Action Committee - Wisconsin | $26,354 | $30 |
| 12 | Plumbers Local 75 PAC | $23,607 | $8 |
| 13 | Wisconsin Laborers District Council | $23,244 | $3 |
| 14 | WI Institute of CPA's PAC | $20,500 | $250 |
| 15 | A Better Wisconsin Together Political Fund | $20,395 | $20,395 |
| 16 | Mandela for Wisconsin | $19,421 | $32 |
| 17 | Taxpayers for Kapenga | $18,675 | $250 |
| 18 | Steamfitters Local 601 PAC | $18,416 | $1 |
| 19 | Outagamie Co Republican Party | $18,103 | $55 |
| 20 | Janet Bewley for Senate | $16,730 | $90 |
| 21 | Warren Petryk For Assembly | $16,140 | $100 |
| 22 | Friends & Neighbors of Robin Vos | $16,082 | $250 |
| 23 | Republican Party-Eau Claire County | $16,016 | $20 |
| 24 | Jon Erpenbach Senate Committee | $16,005 | $250 |
| 25 | La Crosse County Republican Party | $15,724 | $95 |
| 26 | Republican Party of Brown Co | $15,655 | $50 |
| 27 | Duey for Senate | $15,434 | $100 |
| 28 | Wisconsin Pipe Trades Assn PAC | $14,562 | $3 |
| 29 | Friends of Tod Ohnstad | $12,972 | $50 |
| 30 | Republican Party of Wisconsin | $12,085 | $1,038 |
| 31 | Friends of Swearingen | $11,850 | $200 |
| 32 | Democratic Party of Walworth County | $11,552 | $33 |
| 33 | Jonathan Wichmann for Wisconsin Governor | $10,014 | $50 |
| 34 | Concerned Realtors Committee | $9,748 | $20 |
| 35 | Republican Party of Walworth County | $9,197 | $20 |
| 36 | Nancy for Wisconsin | $9,140 | $100 |
| 37 | Friends of John Macco | $9,105 | $250 |
| 38 | Wisconsin Bankers Association PAC | $8,780 | $50 |
| 39 | Kurtz for Assembly | $8,305 | $100 |
| 40 | Council of Auto & Truck Retail Political Action Committee | $8,300 | $300 |
| 41 | Volunteers for Agriculture VFA | $8,112 | $10 |
| 42 | Citizens for August | $8,054 | $250 |
| 43 | Petersen- Republican for 40th Assembly | $7,370 | $100 |
| 44 | Wisconsin Hospitals PAC | $7,260 | $250 |
| 45 | Winnebago County Democratic Party | $7,250 | $50 |
| 46 | Friends of Alberta Darling | $7,000 | $500 |
| 47 | Friends of Julian Bradley | $6,656 | $100 |
| 48 | Friends of Van Wanggaard | $6,636 | $50 |
| 49 | St Croix County Republican Party | $6,095 | $60 |
| 50 | Republican Party of Ozaukee County | $5,890 | $90 |
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