ZIP code 21237: Rosedale, MD
ZIP code 21237 is in Rosedale (47% of residents), Rossville (47%) and White Marsh (5.9%), in Baltimore County (100%) and Baltimore city (0.1%), Maryland. It is in Maryland's 2nd congressional district (93%) and Maryland's 7th congressional district (7.1%). Its state senate districts are State Senate District 8 (88%), State Senate District 6 (12%) and State Senate District 45 (0.1%); its state house districts are State Legislative District 8 (88%), State Legislative District 6 (12%) and State Legislative District 45 (0.1%).
See it on the mapAll of Maryland
City and county
| City or town | Share of ZIP residents |
|---|---|
| Rosedale | 47% |
| Rossville | 47% |
| White Marsh | 5.9% |
| Baltimore | 0.1% |
| Perry Hall | <0.1% |
| County | Share of ZIP residents |
|---|---|
| Baltimore County | 100% |
| Baltimore city | 0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 14 | 88% |
| District 15 | 12% |
| Baltimore city | 0.1% |
| District 11 | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Maryland's 2nd congressional district (MD-02) | 93% |
| Maryland's 7th congressional district (MD-07) | 7.1% |
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 |
|---|---|---|---|
| U.S. Representative (MD-02) | Johnny Olszewski, Jr. (D) | 202-225-3061 | 93% |
| U.S. Representative (MD-07) | Kweisi Mfume (D) | 202-225-4741 | 7.1% |
| U.S. Senator | Angela D. Alsobrooks (D) | 202-224-4524 · contact form | statewide |
| U.S. Senator | Chris Van Hollen (D) | 202-224-4654 · contact form | statewide |
| State Senator (State Senate District 8) | Carl Jackson (Democratic) | 88% | |
| State Senator (State Senate District 6) | Johnny Salling (R) | 12% | |
| State Senator (State Senate District 45) | Cory McCray (Democratic) | 0.1% | |
| Delegate (State Legislative District 8) | Harry Bhandari (Democratic) | 410-841-3526 | 88% |
| Delegate (State Legislative District 8) | Kim Ross (Democratic) | 88% | |
| Delegate (State Legislative District 8) | Nick Allen (Democratic) | 88% | |
| Delegate (State Legislative District 6) | Bob Long (R) | 12% | |
| Delegate (State Legislative District 6) | Ric Metzgar (R) | 12% | |
| Delegate (State Legislative District 6) | Robin Grammer (R) | 12% | |
| Delegate (State Legislative District 45) | Caylin Young (Democratic) | 0.1% | |
| Delegate (State Legislative District 45) | Jackie Addison (Democratic) | 0.1% | |
| Delegate (State Legislative District 45) | Stephanie Smith (Democratic) | 0.1% |
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
- Rosedale laws: search for the Rosedale, Maryland code of ordinances
- Rossville laws: search for the Rossville, Maryland code of ordinances
- White Marsh laws: search for the White Marsh, Maryland code of ordinances
- Baltimore County website: https://www.baltimorecountymd.gov/
- Baltimore County laws: search for the Baltimore County, Maryland code of ordinances
- Baltimore city website: https://www.baltimorecity.gov/
- Baltimore city laws: search for the Baltimore city, Maryland code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 8 | 88% |
| State Senate District 6 | 12% |
| State Senate District 45 | 0.1% |
| State house district | Share of ZIP residents |
|---|---|
| State Legislative District 8 | 88% |
| State Legislative District 6 | 12% |
| State Legislative District 45 | 0.1% |
Voting precincts
14 voting precincts overlap ZIP 21237. 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:21237")
ZIP 21237 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.