ZIP code 21737: District 4, Lisbon, MD
ZIP code 21737 is in Howard County, Maryland, outside any city or Census-designated place. It is in Maryland's 3rd congressional district. Its state senate districts are State Senate District 9 (98%) and State Senate District 13 (2.4%); its state house districts are State Legislative Subdistrict 9A (98%) and State Legislative District 13 (2.4%).
See it on the mapAll of Maryland
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Howard County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 4, Lisbon | 40% |
| District 5, Clarksville | 35% |
| District 3, West Friendship | 25% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Maryland's 3rd congressional district (MD-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MD-03) | Sarah Elfreth (D) | 202-225-4016 | 100% |
| 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 9) | Katie Hester (Democratic) | 98% | |
| State Senator (State Senate District 13) | Guy Guzzone (Democratic) | 2.4% | |
| Delegate (State Legislative Subdistrict 9A) | Chao Wu (Democratic) | 98% | |
| Delegate (State Legislative Subdistrict 9A) | Natalie Ziegler (Democratic) | 98% | |
| Delegate (State Legislative District 13) | Gabriel Moreno (Democratic) | 2.4% | |
| Delegate (State Legislative District 13) | Jen Terrasa (Democratic) | 2.4% | |
| Delegate (State Legislative District 13) | Pam Guzzone (Democratic) | 2.4% |
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
- Howard County website: https://www.howardcountymd.gov/
- Howard County laws: search for the Howard County, Maryland code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 9 | 98% |
| State Senate District 13 | 2.4% |
| State house district | Share of ZIP residents |
|---|---|
| State Legislative Subdistrict 9A | 98% |
| State Legislative District 13 | 2.4% |
Voting precincts
4 voting precincts overlap ZIP 21737. 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:21737")
ZIP 21737 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.