Warren County, MO: Cities, ZIP Codes & Population
Warren County is a county-level area in Missouri identified by the FIPS code 29219. Our data lists 7 places in it, led by Warrenton, MO, with combined estimates of about 16,708 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Warren County?
| County | Warren County |
|---|---|
| State | Missouri |
| FIPS code | 29219 |
| Places in our data | 7 |
| Places with a city page | 1 |
| Combined place estimates | 16,708 |
| Largest place | Warrenton, MO (9,672) |
| Rank in state | 37th of 115 counties by combined place population |
| Weighted density | 872 per sq mi |
| Time zone | Central time |
| ZIP codes | 4 |
Which cities and towns are in Warren County?
Warren County has 1 place large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Warrenton, MO is the largest.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Warrenton, MO | Incorporated | 9,672 | 943 | 1 |
The county also contains 6 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Wright City, Marthasville, Truesdale, Innsbrook, Pendleton, Three Creeks. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Warren County compared with other counties in Missouri?
Adding up the estimates for the places in our data gives 16,708 people, which ranks Warren County 37th among 115 counties in Missouri. The average listed place has about 2,387 residents. The weighted density is about 872 people per square mile, which is small-town or exurban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Warren County?
The places in Warren County use 4 ZIP codes: 63357, 63380, 63383, 63390. Every code begins with 6, which is assigned to the central Midwest (Illinois, Kansas, Missouri and Nebraska). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Warren County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Lincoln County, MO — about 20 miles northeast (center to center), 25,099 people in listed places
- St. Charles County, MO — about 21 miles east (center to center), 307,296 people in listed places
- Montgomery County, MO — about 22 miles northwest (center to center), 6,447 people in listed places
- Franklin County, MO — about 24 miles south (center to center), 62,406 people in listed places
- Gasconade County, MO — about 29 miles southwest (center to center), 6,437 people in listed places
- Calhoun County, IL — about 36 miles northeast (center to center), 1,652 people in listed places
What does the FIPS code 29219 mean?
The first two digits, 29, identify Missouri, and the last three, 219, identify Warren County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Missouri hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.