ZIP code 21028: District 3, Bel Air, MD
ZIP code 21028 is in Harford County, Maryland, outside any city or Census-designated place. It is in Maryland's 1st congressional district. Its state senate district is State Senate District 35; its state house district is State Legislative Subdistrict 35A.
See it on the mapAll of Maryland
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Harford County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 3, Bel Air | 84% |
| District 2, Halls Cross Roads | 16% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Maryland's 1st congressional district (MD-01) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MD-01) | Andy Harris (R) | 202-225-5311 | 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 35) | Jason Gallion (R) | 100% | |
| Delegate (State Legislative Subdistrict 35A) | Mike Griffith (R) | 100% | |
| Delegate (State Legislative Subdistrict 35A) | Teresa Reilly (R) | 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
- Harford County website: https://www.harfordcountymd.gov/
- Harford County laws: search for the Harford County, Maryland code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 35 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State Legislative Subdistrict 35A | 100% |
Voting precincts
3 voting precincts overlap ZIP 21028. 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:21028")
ZIP 21028 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.