ZIP code 20191: Reston, VA

ZIP code 20191 is in Reston, in Fairfax County, Virginia. It is in Virginia's 11th congressional district. Its state senate district is State Senate District 38; its state house district is House of Delegates District 7.

29,948residents (2020 Census)

7.8 sq miland area

2cities and towns

1congressional district

6voting precincts

See it on the map All of Virginia

City and county

City or town	Share of ZIP residents
Reston	100%
Difficult Run	0.2%

County	Share of ZIP residents
Fairfax County	100%

Town or county subdivision	Share of ZIP residents
Hunter Mill district	100%

Congressional district

Congressional district	Share of ZIP residents
Virginia's 11th congressional district (VA-11)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (VA-11)	James R. Walkinshaw (D)	202-225-1492	100%
U.S. Senator	Mark R. Warner (D)	202-224-2023 · contact form	statewide
U.S. Senator	Tim Kaine (D)	202-224-4024 · contact form	statewide
State Senator (State Senate District 38)	Jennifer Boysko (Democratic)		100%
Delegate (State House District 7)	Karen Keys-Gamarra (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

Reston website: http://www.reston.org
Reston laws: search for the Reston, Virginia code of ordinances
Fairfax County website: https://www.fairfaxcounty.gov/
Fairfax County laws: search for the Fairfax County, Virginia code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 38	100%

State house district	Share of ZIP residents
House of Delegates District 7	100%

Voting precincts

6 voting precincts overlap ZIP 20191. 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:

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ZIP 20191 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.