ZIP code 21403: Annapolis, MD

ZIP code 21403 is in Annapolis (68% of residents) and Annapolis Neck (32%), in Anne Arundel County, Maryland. It is in Maryland's 3rd congressional district. Its state senate district is State Senate District 30; its state house district is State Legislative Subdistrict 30A.

31,521residents (2020 Census)

9.3 sq miland area

3cities and towns

1congressional district

14voting precincts

See it on the map All of Maryland

City and county

City or town	Share of ZIP residents
Annapolis	68%
Annapolis Neck	32%
Highland Beach	0.4%

County	Share of ZIP residents
Anne Arundel County	100%

Town or county subdivision	Share of ZIP residents
District 6	100%

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 30)	Shaneka Henson (Democratic)		100%
Delegate (State Legislative Subdistrict 30A)	Dana Jones (Democratic)		100%
Delegate (State Legislative Subdistrict 30A)	Dylan Behler (Democratic)		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

Annapolis website: https://www.annapolis.gov/
Annapolis laws: search for the Annapolis, Maryland code of ordinances
Annapolis Neck laws: search for the Annapolis Neck, Maryland code of ordinances
Anne Arundel County website: https://www.aacounty.org/
Anne Arundel County laws: search for the Anne Arundel County, Maryland code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 30	100%

State house district	Share of ZIP residents
State Legislative Subdistrict 30A	100%

Voting precincts

14 voting precincts overlap ZIP 21403. 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:21403")

ZIP 21403 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.