ZIP code 42431: Madisonville, KY

ZIP code 42431 is in Madisonville (74% of residents), in Hopkins County, Kentucky. 26% of its residents live outside city limits. It is in Kentucky's 1st congressional district. Its state senate district is State Senate District 4; its state house district is State House District 4.

26,566residents (2020 Census)

166.7 sq miland area

1cities and towns

1congressional district

36voting precincts

See it on the map All of Kentucky

City and county

City or town	Share of ZIP residents
Madisonville	74%

County	Share of ZIP residents
Hopkins County	100%

Town or county subdivision	Share of ZIP residents
Madisonville CCD	97%
Hanson CCD	1.6%
Nebo CCD	0.7%
Dawson Springs CCD	0.3%

Congressional district

Congressional district	Share of ZIP residents
Kentucky's 1st congressional district (KY-01)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (KY-01)	James Comer (R)	202-225-3115	100%
U.S. Senator	Mitch McConnell (R)	202-224-2541 · contact form	statewide
U.S. Senator	Rand Paul (R)	202-224-4343 · contact form	statewide
State Senator (State Senate District 4)	Robby Mills (R)		100%
State Representative (State House District 4)	Wade Williams (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

Madisonville website: http://www.madisonvillegov.com
Madisonville laws: search for the Madisonville, Kentucky code of ordinances
Hopkins County website: http://hopkinscounty.ky.gov/
Hopkins County laws: search for the Hopkins County, Kentucky code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 4	100%

State house district	Share of ZIP residents
State House District 4	100%

Voting precincts

36 voting precincts overlap ZIP 42431. 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:42431")

ZIP 42431 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.