Boundary Atlas

ZIP code 20712: Mount Rainier, MD

ZIP code 20712 is in Mount Rainier (87% of residents), Brentwood (8.9%) and Chillum (3.6%), in Prince George's County, Maryland. It is in Maryland's 4th congressional district. Its state senate district is State Senate District 47; its state house district is State Legislative Subdistrict 47A.

9,526residents (2020 Census)
0.7 sq miland area
3cities and towns
1congressional district
3voting precincts

See it on the mapAll of Maryland

City and county

City or townShare of ZIP residents
Mount Rainier87%
Brentwood8.9%
Chillum3.6%

CountyShare of ZIP residents
Prince George's County100%

Town or county subdivisionShare of ZIP residents
District 17, Chillum100%

Congressional district

Congressional districtShare of ZIP residents
Maryland's 4th congressional district (MD-04)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MD-04)Glenn Ivey (D)202-225-8699100%
U.S. SenatorAngela D. Alsobrooks (D)202-224-4524 · contact formstatewide
U.S. SenatorChris Van Hollen (D)202-224-4654 · contact formstatewide
State Senator (State Senate District 47)Malcolm Augustine (Democratic)100%
Delegate (State Legislative Subdistrict 47A)Diana Fennell (Democratic)100%
Delegate (State Legislative Subdistrict 47A)Julian Ivey (Democratic)100%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 47100%

State house districtShare of ZIP residents
State Legislative Subdistrict 47A100%

Voting precincts

3 voting precincts overlap ZIP 20712. 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:20712")

ZIP 20712 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.