Boundary Atlas

ZIP code 40243: Middletown, KY

ZIP code 40243 is in Middletown (60% of residents), Douglass Hills (30%), Woodland Hills (6.4%) and Louisville/Jefferson County metro government (balance) (3.1%), in Jefferson County, Kentucky. It is in Kentucky's 3rd congressional district. Its state senate district is State Senate District 36; its state house districts are State House District 31 (43%), State House District 36 (30%) and State House District 33 (27%).

11,521residents (2020 Census)
4.1 sq miland area
4cities and towns
1congressional district
14voting precincts

See it on the mapAll of Kentucky

City and county

City or townShare of ZIP residents
Middletown60%
Douglass Hills30%
Woodland Hills6.4%
Louisville/Jefferson County metro government (balance)3.1%

CountyShare of ZIP residents
Jefferson County100%

Town or county subdivisionShare of ZIP residents
Southeast Jefferson CCD86%
East Jefferson CCD14%

Congressional district

Congressional districtShare of ZIP residents
Kentucky's 3rd congressional district (KY-03)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 36100%

State house districtShare of ZIP residents
State House District 3143%
State House District 3630%
State House District 3327%

Voting precincts

14 voting precincts overlap ZIP 40243. 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:40243")

ZIP 40243 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.