Boundary Atlas

Missouri's 4th congressional district (MO-04)

Missouri's 4th congressional district (MO-04) covers parts or all of 24 counties, including Barton County, Bates County, Benton County, Cass County, Cedar County and Dade County, and 209 ZIP codes (144 wholly inside it). Its 2020 population was 769,364. This is the map in force for the November 3, 2026 election.

769,364residents (2020 Census)
24counties
209ZIP codes
456voting precincts

Who represents MO-04

OfficeMemberContact
U.S. Representative (MO-04)Mark Alford (R)202-225-2876
U.S. SenatorEric Schmitt (R)202-224-5721 · contact form
U.S. SenatorJosh Hawley (R)202-224-6154 · contact form

Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).

Counties

CountyShare of the county's residents in MO-04
Barton County100%
Bates County100%
Benton County100%
Cass County100%
Cedar County100%
Dade County100%
Dallas County100%
Henry County100%
Hickory County100%
Howard County100%
Johnson County100%
Laclede County100%
Lafayette County100%
Morgan County100%
Pettis County100%
Polk County100%
Pulaski County100%
Saline County100%
St. Clair County100%
Vernon County100%
Camden County72%
Webster County56%
Boone County44%
Jackson County11%

ZIP codes

Percentages mark ZIPs only partly in MO-04: the share of that ZIP's residents inside it.

Towns

Adair township, Alexander township, Appleton township, Arrow Rock township, Auglaize township, Auglaize township, Austin township, Bacon township, Badger township, Barton City township, Bear Creek township, Benton township, Bethlehem township, Big Creek township, Big Creek township, Blackwater township, Blackwater township, Blue Mound township, Bogard township, Bonne Femme township, Boonslick township, Bourbon township, Bowling Green township, Box township, Buffalo township, Burton township, Butler township, Cambridge township, Camp Branch township, Campbell township, Cedar township, Cedar township, Cedar township, Center township, Center township, Center township, Center township, Centerview township, Central township and Centralia township and others.

Get this in your AI agent

Your agent can draw every precinct in MO-04, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

get_boundaries(id="us:congressional_district:2904", children_level="precinct", include_districts=True)