Boundary Atlas

ZIP code 20818: Cabin John, MD

ZIP code 20818 is in Cabin John, in Montgomery County, Maryland. It is in Maryland's 8th congressional district. Its state senate district is State Senate District 16; its state house district is State Legislative District 16.

1,832residents (2020 Census)
0.9 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of Maryland

City and county

City or townShare of ZIP residents
Cabin John100%

CountyShare of ZIP residents
Montgomery County100%

Town or county subdivisionShare of ZIP residents
District 7100%

Congressional district

Congressional districtShare of ZIP residents
Maryland's 8th congressional district (MD-08)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MD-08)Jamie Raskin (D)202-225-5341100%
U.S. SenatorAngela D. Alsobrooks (D)202-224-4524 · contact formstatewide
U.S. SenatorChris Van Hollen (D)202-224-4654 · contact formstatewide
State Senator (State Senate District 16)Sara Love (Democratic)100%
Delegate (State Legislative District 16)Marc Korman (Democratic)100%
Delegate (State Legislative District 16)Sarah Wolek (Democratic)100%
Delegate (State Legislative District 16)Teresa Woorman (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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 16100%

State house districtShare of ZIP residents
State Legislative District 16100%

Voting precincts

1 voting precinct overlap ZIP 20818. Map them, with each precinct's share of the ZIP's residents.

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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:

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ZIP 20818 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.