Boundary Atlas

ZIP code 64040: Holden, MO

ZIP code 64040 is in Holden (33% of residents), in Johnson County (100%) and Cass County (<0.1%), Missouri. 67% of its residents live outside city limits. It is in Missouri's 4th congressional district. Its state senate district is State Senate District 31; its state house districts are State House District 54 (81%), State House District 57 (19%) and State House District 55 (<0.1%).

6,624residents (2020 Census)
165.7 sq miland area
1cities and towns
1congressional district
9voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Holden33%

CountyShare of ZIP residents
Johnson County100%
Cass County<0.1%

Town or county subdivisionShare of ZIP residents
Madison township49%
Jackson township26%
Rose Hill township11%
Chilhowee township4.0%
Columbus township3.9%
Kingsville township3.4%
Centerview township1.8%
Index township<0.1%

Congressional district

Congressional districtShare of ZIP residents
Missouri's 4th congressional district (MO-04)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 31100%

State house districtShare of ZIP residents
State House District 5481%
State House District 5719%
State House District 55<0.1%

Voting precincts

9 voting precincts overlap ZIP 64040. 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:

related_geographies(id="us:zcta:64040")

ZIP 64040 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.