ZIP code 20186: Warrenton, VA
ZIP code 20186 is in Warrenton (66% of residents) and Opal (1.3%), in Fauquier County (100%) and Culpeper County (0.2%), Virginia. 32% of its residents live outside city limits. It is in Virginia's 10th congressional district (100%) and Virginia's 7th congressional district (0.2%). Its state senate districts are State Senate District 28 (74%) and State Senate District 31 (26%); its state house districts are House of Delegates District 61 (98%) and House of Delegates District 30 (2.3%).
See it on the mapAll of Virginia
City and county
| City or town | Share of ZIP residents |
|---|---|
| Warrenton | 66% |
| Opal | 1.3% |
| County | Share of ZIP residents |
|---|---|
| Fauquier County | 100% |
| Culpeper County | 0.2% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Center district | 66% |
| Marshall district | 26% |
| Lee district | 6.7% |
| Cedar Run district | 1.3% |
| Jefferson district | 0.2% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Virginia's 10th congressional district (VA-10) | 100% |
| Virginia's 7th congressional district (VA-07) | 0.2% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 28 | 74% |
| State Senate District 31 | 26% |
| State house district | Share of ZIP residents |
|---|---|
| House of Delegates District 61 | 98% |
| House of Delegates District 30 | 2.3% |
Voting precincts
11 voting precincts overlap ZIP 20186. 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:20186")
ZIP 20186 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.