ZIP code 20689: District 3, Sunderland, MD
ZIP code 20689 is in Calvert County, Maryland, outside any city or Census-designated place. It is in Maryland's 5th congressional district. Its state senate district is State Senate District 27; its state house districts are State Legislative Subdistrict 27C (60%) and State Legislative Subdistrict 27B (40%).
See it on the mapAll of Maryland
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Calvert County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 3, Sunderland | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Maryland's 5th congressional district (MD-05) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MD-05) | Steny H. Hoyer (D) | 202-225-4131 | 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 27) | Kevin Harris (Democratic) | 100% | |
| Delegate (State Legislative Subdistrict 27C) | Mark Fisher (R) | 60% | |
| Delegate (State Legislative Subdistrict 27B) | Jeff Long (Democratic) | 40% |
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
- Calvert County website: http://www.co.cal.md.us/
- Calvert County laws: search for the Calvert County, Maryland code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 27 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State Legislative Subdistrict 27C | 60% |
| State Legislative Subdistrict 27B | 40% |
Voting precincts
2 voting precincts overlap ZIP 20689. 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:20689")
ZIP 20689 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.