Marion County, Missouri
Marion County, Missouri, has 28,525 residents (July 2025 estimate). Its county seat is Palmyra. It uses Central Time and covers 437 sq mi (1,132 km²) of land.
- Resident population, July 2025
- 28,525
- Land area
- 437 sq mi (1,132 km²)
- County seat or government
- Palmyra
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $62,903 ± $2,753
- Median home value
- $162,000 ± $7,169
- Median rent, with utilities
- $808 ± $47
- Homes lived in by their owners
- 69.3% ± 2.9 points
- County type
- County
- Metro or micro area
- Hannibal, MO micro areaCentral county
- Water area
- 7.37 sq mi (19.1 km²)
- State
- Missouri
- County code (FIPS)
- 29127
- Coordinates (central point)
- 39.807538, -91.635379
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Marion County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 6340121,489 people
- 634615,446 people
- 634564,749 people
- 634401,136 people
- 634541,104 people
- 63471770 people
- 63463711 people
- 63443393 people
- 63438232 people
- 63439183 people
10 ZIP Code areas overlap Marion County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Townships in Marion County, largest first
- Mason Township12,342 people
- Miller Township6,574 people
- Liberty Township4,457 people
- Warren Township1,554 people
- Fabius Township1,114 people
- Round Grove Township1,067 people
- Union Township929 people
- South River Township420 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Missouri, by county
School districts in Marion County, largest first
- Hannibal 60 School District22,218 people
- Palmyra R-I School District6,641 people
- Lewis County C-1 School District6,092 people
- Monroe City R-I School District6,075 people
- Marion County R-II School District1,592 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Hannibal, Missouri (city)16,771 people
- Palmyra, Missouri (city)3,623 people
- Monroe City, Missouri (city)3,028 people
- Philadelphia, Missouri (CDP)219 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Ralls County, Missouri19 mi south
- Lewis County, Missouri20 mi north
- Shelby County, Missouri24 mi west
- Adams County, Illinois26 mi northeast
- Monroe County, Missouri29 mi southwest
- Pike County, Illinois42 mi east
Before using this answer on a form
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