Boundary Atlas

ZIP code 64640: Gallatin, MO

ZIP code 64640 is in Gallatin (57% of residents) and Lake Viking (12%), in Daviess County, Missouri. 31% of its residents live outside city limits. It is in Missouri's 6th congressional district. Its state senate district is State Senate District 12; its state house district is State House District 2.

3,168residents (2020 Census)
143.9 sq miland area
2cities and towns
1congressional district
5voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Gallatin57%
Lake Viking12%

CountyShare of ZIP residents
Daviess County100%

Town or county subdivisionShare of ZIP residents
Union township67%
Liberty township18%
Jackson township3.4%
Monroe township3.4%
Sheridan township2.5%
Harrison township2.1%
Grand River township2.1%
Marion township1.5%

Congressional district

Congressional districtShare of ZIP residents
Missouri's 6th congressional district (MO-06)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MO-06)Sam Graves (R)202-225-7041100%
U.S. SenatorEric Schmitt (R)202-224-5721 · contact formstatewide
U.S. SenatorJosh Hawley (R)202-224-6154 · contact formstatewide
State Senator (State Senate District 12)Rusty Black (R)100%
State Representative (State House District 2)Mazzie Christensen (R)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 12100%

State house districtShare of ZIP residents
State House District 2100%

Voting precincts

5 voting precincts overlap ZIP 64640. 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:64640")

ZIP 64640 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.