Lake Wisconsin, Wisconsin
Lake Wisconsin is a Census-designated place (an unincorporated community) in Columbia County (98% of residents) and Sauk County (2.0%), Wisconsin, with 4,616 residents in 2020. It spans 2 congressional districts: WI-06 (98%) and WI-02 (2.0%). It spans 2 state house districts. Its state senate district is State Senate District 14.
County
| County | Share of residents |
|---|---|
| Columbia County | 98% |
| Sauk County | 2.0% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Wisconsin's 6th congressional district (WI-06) | 98% |
| Wisconsin's 2nd congressional district (WI-02) | 2.0% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (WI-06) | Glenn Grothman (R) | 202-225-2476 | 98% |
| U.S. Representative (WI-02) | Mark Pocan (D) | 202-225-2906 | 2.0% |
| U.S. Senator | Ron Johnson (R) | 202-224-5323 · contact form | statewide |
| U.S. Senator | Tammy Baldwin (D) | 202-224-5653 · contact form | statewide |
| State Senator (State Senate District 14) | Sarah Keyeski (Democratic) | 100% | |
| Assembly Member (Assembly District 42) | Maureen McCarville (Democratic) | 97% | |
| Assembly Member (Assembly District 40) | Karen DeSanto (Democratic) | 3.2% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Lake Wisconsin laws: search for the Lake Wisconsin, Wisconsin code of ordinances
- Columbia County laws: search for the Columbia County, Wisconsin code of ordinances
- Sauk County website: http://www.co.sauk.wi.us
- Sauk County laws: search for the Sauk County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 14 | 100% |
| State house district | Share of residents |
|---|---|
| Assembly District 42 | 97% |
| Assembly District 40 | 3.2% |
ZIP codes
Percentages mark ZIPs only partly in Lake Wisconsin: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Lake Wisconsin's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:5542012")
Lake Wisconsin here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.