Wisconsin's 4th congressional district (WI-04)
Wisconsin's 4th congressional district (WI-04) lies within Milwaukee County, and 30 ZIP codes (22 wholly inside it). Its 2020 population was 736,714. This is the map in force for the November 3, 2026 election.
Who represents WI-04
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (WI-04) | Gwen Moore (D) | 202-225-4572 |
| U.S. Senator | Ron Johnson (R) | 202-224-5323 · contact form |
| U.S. Senator | Tammy Baldwin (D) | 202-224-5653 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in WI-04 |
|---|---|
| Milwaukee County | 78% |
ZIP codes
Percentages mark ZIPs only partly in WI-04: the share of that ZIP's residents inside it.
- 53202
- 53203
- 53204
- 53205
- 53206
- 53207
- 53208
- 53209
- 53210
- 53211
- 53212
- 53213
- 53214 (77%)
- 53215
- 53216
- 53217 (100%)
- 53218
- 53219 (98%)
- 53220 (44%)
- 53221 (73%)
- 53222
- 53223
- 53224
- 53225
- 53226
- 53227 (43%)
- 53228 (23%)
- 53233
- 53235 (0.1%)
- 53295
Towns
Bayside village, Brown Deer village, Fox Point village, Glendale city, Milwaukee city, River Hills village, Shorewood village, Wauwatosa city, West Milwaukee village, Whitefish Bay village, West Allis city and Greenfield city.
Get this in your AI agent
Your agent can draw every precinct in WI-04, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:5504", children_level="precinct", include_districts=True)