ZIP code 53228: Greenfield, WI
ZIP code 53228 is in Greenfield (77% of residents) and Milwaukee (23%), in Milwaukee County, Wisconsin. It is in Wisconsin's 5th congressional district (77%) and Wisconsin's 4th congressional district (23%). Its state senate districts are State Senate District 21 (100%) and State Senate District 5 (0.2%); its state house districts are Assembly District 61 (100%) and Assembly District 14 (0.2%).
See it on the mapAll of Wisconsin
City and county
| City or town | Share of ZIP residents |
|---|---|
| Greenfield | 77% |
| Milwaukee | 23% |
| West Allis | 0.2% |
| County | Share of ZIP residents |
|---|---|
| Milwaukee County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Greenfield city | 77% |
| Milwaukee city | 23% |
| West Allis city | 0.2% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Wisconsin's 5th congressional district (WI-05) | 77% |
| Wisconsin's 4th congressional district (WI-04) | 23% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Cavalier Johnson | 414-286-2200 | 23% |
| U.S. Representative (WI-05) | Scott Fitzgerald (R) | 202-225-5101 | 77% |
| U.S. Representative (WI-04) | Gwen Moore (D) | 202-225-4572 | 23% |
| 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 21) | Van Wanggaard (R) | 100% | |
| State Senator (State Senate District 5) | Rob Hutton (R) | 0.2% | |
| Assembly Member (Assembly District 61) | Bob Donovan (R) | 100% | |
| Assembly Member (Assembly District 14) | Angelito Tenorio (Democratic) | 0.2% |
Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Greenfield website: http://www.ci.greenfield.wi.us/
- Greenfield laws: search for the Greenfield, Wisconsin code of ordinances
- Milwaukee website: https://city.milwaukee.gov/
- Milwaukee laws: search for the Milwaukee, Wisconsin code of ordinances
- Milwaukee County website: http://www.county.milwaukee.gov
- Milwaukee County laws: search for the Milwaukee County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 100% |
| State Senate District 5 | 0.2% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 61 | 100% |
| Assembly District 14 | 0.2% |
Voting precincts
14 voting precincts overlap ZIP 53228. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:53228")
ZIP 53228 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.