Monroe City is a city in Marion County, Missouri, home to about 3,028 people across 3.0 square miles. Its ZIP code is 63456.
Homes sold for a median of $116 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Monroe City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Monroe City’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)96 miles away |
|---|---|
| Closer regional airport | Quincy Regional Airport Baldwin Field (UIN)34 miles away |
| Nearest city of 250,000+ | St. Louis, MO106 miles away |
| Nearest city of 1 million+ | Chicago, IL259 miles away |
Straight-line distances from the center of Monroe City; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Monroe City had 2,652 residents in the 2020 census, up 2% since 2000.
It’s the 202nd largest of 1,060 towns in Missouri by population.
Marion County grew from 26,331 residents in 1900 to 28,525 in 2020.
Marion County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 18°F. About 41.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Monroe City, MO weather station (about a mile away).
10,807 jobs at 797 businesses in Marion County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
6 doctors and other health care providers list an office in Monroe City.
Nearest hospitals
Providers with an office here
| Dentists | 1 |
|---|---|
| Nurse practitioners and physician assistants | 3 |
| Physical and occupational therapists | 1 |
| Chiropractors | 1 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (9 nearby)
Libraries (1 nearby)
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Monroe City R-I. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Monroe City Elem.Monroe City | Pre-K–4 | 331 | Public | 0.5 mi |
| Monroe City MiddleMonroe City | 5–8 | 178 | Public | 0.5 mi |
| Monroe City R-I HighMonroe City | 9–12 | 271 | Public | 0.4 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Holy Rosary SchoolMonroe City | Pre-K–8 | 174 | Roman Catholic | 0.8 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.