Boundary Atlas

ZIP code 21136: Reisterstown, MD

ZIP code 21136 is in Reisterstown (60% of residents), in Baltimore County (97%) and Carroll County (2.8%), Maryland. 40% of its residents live outside city limits. It is in Maryland's 2nd congressional district. Its state senate districts are State Senate District 10 (89%), State Senate District 11 (7.1%) and State Senate District 42 (3.5%); its state house districts are State Legislative District 10 (89%), State Legislative Subdistrict 11A (5.8%), State Legislative Subdistrict 42C (2.8%), State Legislative Subdistrict 11B (1.3%) and State Legislative Subdistrict 42A (0.7%).

34,973residents (2020 Census)
56.2 sq miland area
2cities and towns
1congressional district
20voting precincts

See it on the mapAll of Maryland

City and county

City or townShare of ZIP residents
Reisterstown60%
Owings Mills0.1%

CountyShare of ZIP residents
Baltimore County97%
Carroll County2.8%

Town or county subdivisionShare of ZIP residents
District 489%
District 86.4%
District 4, Woolerys2.8%
District 21.0%
District 50.7%

Congressional district

Congressional districtShare of ZIP residents
Maryland's 2nd congressional district (MD-02)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MD-02)Johnny Olszewski, Jr. (D)202-225-3061100%
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 10)Ben Brooks (Democratic)89%
State Senator (State Senate District 11)Shelly Hettleman (Democratic)7.1%
State Senator (State Senate District 42)Chris West (R)3.5%
Delegate (State Legislative District 10)Adrienne Jones (Democratic)410-455-533089%
Delegate (State Legislative District 10)Jennifer White Holland (Democratic)89%
Delegate (State Legislative District 10)Scott Phillips (Democratic)89%
Delegate (State Legislative Subdistrict 11A)Cheryl Pasteur (Democratic)5.8%
Delegate (State Legislative Subdistrict 42C)Josh Stonko (R)2.8%
Delegate (State Legislative Subdistrict 11B)Dana Stein (Democratic)1.3%
Delegate (State Legislative Subdistrict 11B)Jon Cardin (Democratic)1.3%
Delegate (State Legislative Subdistrict 42A)Alex Harlan (R)0.7%

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 1089%
State Senate District 117.1%
State Senate District 423.5%

State house districtShare of ZIP residents
State Legislative District 1089%
State Legislative Subdistrict 11A5.8%
State Legislative Subdistrict 42C2.8%
State Legislative Subdistrict 11B1.3%
State Legislative Subdistrict 42A0.7%

Voting precincts

20 voting precincts overlap ZIP 21136. 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:21136")

ZIP 21136 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.