Lewis County, Missouri Facts for Kids

Quick facts for kids Lewis County
U.S. county
Lewis County Courthouse in Monticello
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Country	United States
State	Missouri
Founded	January 2, 1833
Named for	Meriwether Lewis
Seat	Monticello
Largest city	Canton
Area
• Total	511 sq mi (1,320 km²)
• Land	505 sq mi (1,310 km²)
• Water	5.8 sq mi (15 km²) 1.1%
Population (2020)
• Total	10,032
• Estimate (2018)	9,855
• Density	19.632/sq mi (7.580/km²)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	6th

The Lewis County, Missouri courthouse in Monticello as it appeared in the mid-1870s.

Lewis County is a county located in the northeastern portion of the U.S. state of Missouri. As of the 2020 census, the population was 10,032. Its county seat is Monticello. The county was organized January 2, 1833 and named for Meriwether Lewis, the explorer and Governor of the Louisiana Territory.

Lewis County is part of the Quincy, IL–MO Micropolitan Statistical Area.

Geography
- Adjacent counties
- Major highways
Demographics
Communities
Education
See also

Geography

According to the U.S. Census Bureau, the county has a total area of 511 square miles (1,320 km²), of which 505 square miles (1,310 km²) is land and 5.8 square miles (15 km²) (1.1%) is water.

Adjacent counties

Clark County (north)
Hancock County, Illinois (northeast)
Adams County, Illinois (southeast)
Marion County (south)
Shelby County (southwest)
Knox County (west)

Major highways

U.S. Route 61
Route 6
Route 81
Route 156

Demographics

Historical population
Census	Pop.	%±
1840	6,040	—
1850	6,578	8.9%
1860	12,286	86.8%
1870	15,114	23.0%
1880	15,925	5.4%
1890	15,935	0.1%
1900	16,724	5.0%
1910	15,514	−7.2%
1920	13,465	−13.2%
1930	12,093	−10.2%
1940	11,490	−5.0%
1950	10,733	−6.6%
1960	10,984	2.3%
1970	10,993	0.1%
1980	10,901	−0.8%
1990	10,233	−6.1%
2000	10,494	2.6%
2010	10,211	−2.7%
2020	10,032	−1.8%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2015

As of the census of 2010, there were 10,211 people, 3,956 households, and 2,709 families residing in the county. The population density was 21 people per square mile. The racial makeup of the county was 95.92% White, 2.53% Black or African American, 0.16% Native American, 0.20% Asian, 0.02% Pacific Islander, 0.44% from other races, and 0.73% from two or more races. Approximately 0.73% of the population were Hispanic or Latino of any race. 34.9% were of German, 18.3% American, 11.2% English and 10.8% Irish ancestry.

The average household size was 2.46 and the average family size was 3.00. In the county, the population was spread out, with 25.00% under the age of 18, 12.90% from 18 to 24, 24.60% from 25 to 44, 21.40% from 45 to 64, and 16.10% who were 65 years of age or older and 51% of female population. The median age was 36 years.

Median income for a household in the county was $30,651, and the median income for a family was $35,740. Males had a median income of $27,778 versus $19,679 for females. The per capita income for the county was $14,746. 16.10% of the population and 10.70% of families were below the poverty line.