21st Senate District

District

Candidates

Candidates Registered for WI Senate District 21
Data shows every Democratic or Republican candidate registered to run in 2026 plus the incumbent. See footnote for incumbent reelection status.
candidates	registration_date1	Since 1/1/2025 & reported by 2026-02-04
		contributions	disbursements
Democratic
Trevor Jung	2025-09-13	$133,311 in 734 contributions from 600 unique donors. Median: $100	$4,247.69 in 22 transactions
Republican
Van H Wanggaard (I)2	2005-11-04	$30,410 in 103 contributions from 103 unique donors. Median: $50	$3,344.00 in 7 transactions
1 The date this candidate's committee first registered (for any office). Click the link for details.
2 2026 reelection plans not known (this could be out-of-date)
Data last updated on 2026-02-05

Past election results

Election Results in Wisconsin State Senate District 21
	votes			Dem. %1	margin (Dem. - Rep.)
	total	Dem.	Rep.		votes	points2
2016 President	89,813	41,679	42,782	49.3%	−1,103	−1.3
2016 Senator	89,353	39,964	47,262	45.8%	−7,298	−8.4
2018 Governor	82,854	38,741	42,446	47.7%	−3,705	−4.6
2018 Senator	82,375	43,770	38,481	53.2%	+5,289	+6.4
2020 President	99,201	49,970	47,688	51.2%	+2,282	+2.3
2022 Governor	76,768	39,280	36,732	51.7%	+2,548	+3.4
2022 Senator	76,765	37,993	38,603	49.6%	−610	−0.8
2024 President	99,982	49,550	48,319	50.6%	+1,231	+1.3
2024 Senator	98,794	49,384	47,177	51.1%	+2,207	+2.3
2024 NA	NA	NA	NA	NA	NA	NA
2025 WI Sup. Ct.3	68,098	37,656	30,398	55.3%	+7,258	+10.7
1 Share of the two-party vote. For Rep. share, subtract from 100.
2 Dem % of the two-party vote minus Rep % of the two-party vote
3 Formally nonpartisan candidates assigned party labels based on state endorsements
Election results allocated into 2024 district boundaries based on population overlap. Calculations by John Johnson (johndjohnson.info).

District demographics