Who serves in the Wisconsin Senate?

Current members. Traceable sources.

This is a dated current-member snapshot. Membership follows the active term identified by the official chamber directory. A candidate list or vote lead does not establish a serving member. This view does not refresh automatically.

The current official directories, all 132 original individual detail profiles and the independent official map-portal roster updated November 6, 2026 agree on all names, parties and numbered districts: Assembly 54 Republican / 45 Democratic; Senate 18 Republican / 15 Democratic. No seat is vacant. The January 16, 2025 printed Assembly district directory corroborates all surnames, districts and affiliations; the November 3, 2026 Senate printed office directory corroborates all 33 senators.

The 2025–2026 biennium continues until January 4, 2027 under enrolled 2025 Senate Joint Resolution 1, which separately identifies inauguration of the 2027 legislature on that date. November 3, 2026 election winners are not treated as serving members before the new term or verified intervening service. Announcing retirement or declining reelection does not alone establish a vacancy.

Current seat records are shown on the official 2024 Act 94 district map. Senate terms are staggered: odd-numbered incumbents were elected under earlier boundaries. This is not a reconstruction of their 2022 election territories or an address-level representation determination. Every current member detail profile, including odd-numbered senators, explicitly links its same-number district map as based on 2023 Wisconsin Act 94. The legal GIS layer describes the 2024 Act 94 plan and its source in original Legislative Technology Services Bureau Census-block assignments; political GIS attributes are excluded.

Original source bytes are retained with hashes and retrieval dates. Full current profile spelling, initials and diacritics are preserved; shorter or alternate printed names are documented. This is a dated snapshot, not a live results feed.

Only legislative representation is mapped. Statewide demographic values remain under the direct 2024 ACS state authority. No district demographic estimate or ZIP/ZCTA finding is inferred.

Affiliations follow current official chamber directories and all 132 original detail profiles, independently checked against the official map roster updated November 6, 2026. Senate printed corroboration is effective November 3, 2026; the Assembly printed corroboration is dated January 16, 2025. No automatic refresh.

Uses 2024 Census cartographic shapes where checks agree, and complete Wisconsin DNR/LTSB Act 94 polygons for twelve coastal or island districts. All 226 display rings and current legal outer-component interiors are preserved and checked, along with every label. Census ZZZ not-defined geography is excluded as a non-seat. Current seat records are shown on the official 2024 Act 94 district map. Senate terms are staggered: odd-numbered incumbents were elected under earlier boundaries. This is not a reconstruction of their 2022 election territories or an address-level representation determination.

Official roster sources

• Official current Assembly directory — all 99 members, parties and districts ↗
• Official current Senate directory — all 33 members, parties and districts ↗
• Official legislative map portal — independent current member roster updated November 6, 2026 ↗
• Official Assembly district directory — January 16, 2025 printed corroboration ↗
• Official Senate office directory — effective November 3, 2026 ↗
• 2025 Senate Joint Resolution 1 — current biennium and January 4, 2027 inauguration ↗
• Wisconsin Constitution Article IV — staggered four-year Senate terms ↗

District boundary sources

• Official legislative map portal — current detail profiles explicitly link Act 94 numbered districts ↗
• 2023 Wisconsin Act 94 — enacted February 19, 2024 ↗
• Wisconsin DNR legislative GIS — original LTSB Act 94 Assembly and Senate polygons ↗
• U.S. Census Bureau — 2024 Wisconsin Assembly cartographic display polygons ↗
• U.S. Census Bureau — 2024 Wisconsin Senate cartographic display polygons ↗

These maps describe representation. The 2024 ACS State Demographics authority remains statewide; no district, ZIP, or ZCTA demographic findings are inferred.

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