Maries County is a county located in the U.S. state of Missouri. As of the 2020 census, its population was 8,432.^[1] Its county seat is Vienna.^[2] The county was organized March 2, 1855 and named for the Maries River and Little Maries River. The word "Maries" is derived from the French word marais, which means "marsh, lake, or pond".

Quick Facts Country, State ...

Maries County
County
Maries County Courthouse
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Coordinates: 38°11′N 91°55′W
Country	United States
State	Missouri
Founded	March 2, 1855
Named for	The Maries River and Little Maries River
Seat	Vienna
Largest city	Belle
Area
• Total	530 sq mi (1,400 km2)
• Land	527 sq mi (1,360 km2)
• Water	2.9 sq mi (8 km2)  0.6%
Population  (2020)
• Total	8,432
• Density	16/sq mi (6.1/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	3rd
Website	www.mariescountymo.gov

Close

According to the U.S. Census Bureau, the county has a total area of 530 square miles (1,400 km²), of which 527 square miles (1,360 km²) is land and 2.9 square miles (7.5 km²) (0.6%) is water.^[3]

As of the census^[9] of 2000, there were 8,903 people, 3,519 households, and 2,502 families residing in the county. The population density was 17 people per square mile (6.6 people/km²). There were 4,149 housing units at an average density of 8 units per square mile (3.1/km²). The racial makeup of the county was 97.43% White, 0.33% Black or African American, 0.55% Native American, 0.11% Asian, 0.35% from other races, and 1.24% from two or more races. Approximately 1.16% of the population were Hispanic or Latino of any race.

There were 3,519 households, out of which 31.60% had children under the age of 18 living with them, 59.00% were married couples living together, 7.70% had a female householder with no husband present, and 28.90% were non-families. 25.70% of all households were made up of individuals, and 12.30% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 3.00.

In the county, the population was spread out, with 26.00% under the age of 18, 7.30% from 18 to 24, 26.50% from 25 to 44, 24.50% from 45 to 64, and 15.60% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 101.20 males. For every 100 females age 18 and over, there were 97.90 males.

The median income for a household in the county was $31,925, and the median income for a family was $39,187. Males had a median income of $28,524 versus $20,705 for females. The per capita income for the county was $15,662. About 10.10% of families and 13.10% of the population were below the poverty line, including 17.30% of those under age 18 and 13.20% of those age 65 or over.

• National Register of Historic Places listings in Maries County, Missouri