Boundary Atlas

ZIP code 48221: Detroit, MI

ZIP code 48221 is in Detroit, in Wayne County, Michigan. It is in Michigan's 13th congressional district (52%) and Michigan's 12th congressional district (48%). Its state senate districts are State Senate District 6 (60%), State Senate District 1 (23%) and State Senate District 3 (17%); its state house districts are State House District 5 (60%) and State House District 8 (40%).

38,204residents (2020 Census)
5.2 sq miland area
1cities and towns
2congressional districts
31voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
Detroit100%

CountyShare of ZIP residents
Wayne County100%

Town or county subdivisionShare of ZIP residents
Detroit city100%

Congressional districts

Congressional districtShare of ZIP residents
Michigan's 13th congressional district (MI-13)52%
Michigan's 12th congressional district (MI-12)48%

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

OfficeMemberContactShare of residents
MayorMary Sheffield313-224-3400100%
U.S. Representative (MI-13)Shri Thanedar (D)202-225-580252%
U.S. Representative (MI-12)Rashida Tlaib (D)202-225-512648%
U.S. SenatorElissa Slotkin (D)202-224-4822statewide
U.S. SenatorGary C. Peters (D)202-224-6221 · contact formstatewide
State Senator (State Senate District 6)Mary Cavanagh (Democratic)60%
State Senator (State Senate District 1)Erika Geiss (Democratic)23%
State Senator (State Senate District 3)Stephanie Chang (Democratic)313-922-694917%
State Representative (State House District 5)Regina Weiss (Democratic)60%
State Representative (State House District 8)Helena Scott (Democratic)40%

Elected under MI's previous legislative map; the district's lines changed for 2026.

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 660%
State Senate District 123%
State Senate District 317%

State house districtShare of ZIP residents
State House District 560%
State House District 840%

Voting precincts

31 voting precincts overlap ZIP 48221. 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:48221")

ZIP 48221 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.