St. Clair County, Alabama Facts for Kids

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St. Clair County

U.S. county

St. Clair County Courthouse in Pell City

Flag

Location within the U.S. state of Alabama

Alabama's location within the U.S.

Country

United States

State

Alabama

Founded

November 20, 1818

Largest city

Pell City

Area

• Total

654 sq mi (1,690 km²)

• Land

632 sq mi (1,640 km²)

• Water

22 sq mi (60 km²) 3.3%

Population

(2020)

• Total

91,103

• Estimate

(2021)

92,748

• Density

139.30/sq mi (53.78/km²)

Time zone

UTC−6 (Central)

• Summer (DST)

UTC−5 (CDT)

Congressional district

3rd

County Number 59 on Alabama Licence Plates

St. Clair County is a county located in the central portion of the U.S. state of Alabama. As of the 2020 census, the population was 91,103. It has two county seats: Ashville and Pell City. It is one of two counties in Alabama, and one of 33 in the United States, with more than one county seat. Its name is in honor of General Arthur St. Clair, an officer in the French and Indian War. St. Clair County is included in the Birmingham-Hoover, Alabama Metropolitan Statistical Area.

Demographics
- 2010 census
- 2020 census
Transportation
- Major highways
- Rail
See also

Demographics

Historical population
Census	Pop.	%±
1820	4,166	—
1830	5,975	43.4%
1840	5,638	−5.6%
1850	6,829	21.1%
1860	11,013	61.3%
1870	9,360	−15.0%
1880	14,462	54.5%
1890	17,353	20.0%
1900	19,425	11.9%
1910	20,715	6.6%
1920	23,383	12.9%
1930	24,510	4.8%
1940	27,336	11.5%
1950	26,687	−2.4%
1960	25,388	−4.9%
1970	27,956	10.1%
1980	41,205	47.4%
1990	50,009	21.4%
2000	64,742	29.5%
2010	83,593	29.1%
2020	91,103	9.0%
2021 (est.)	92,748	11.0%
U.S. Decennial Census 1790–1960 1900–1990 1990–2000 2010–2020

2010 census

At the 2010 census there were 83,593 people, 31,624 households, and 23,364 families living in the county. The population density was 132 people per square mile (51/km²). There were 35,541 housing units at an average density of 56 per square mile (22/km²). The racial makeup of the county was 88.2% White, 8.6% Black or African American, 0.3% Native American, 0.6% Asian, 0.1% Pacific Islander, 0.9% from other races, and 1.3% from two or more races. 2.1% of the population were Hispanic or Latino of any race. Of the 31,624 households 30.7% had children under the age of 18 living with them, 58.3% were married couples living together, 11.2% had a female householder with no husband present, and 26.1% were non-families. 22.5% of households were one person and 8.5% were one person aged 65 or older. The average household size was 2.58 and the average family size was 3.02.

The age distribution was 23.7% under the age of 18, 7.8% from 18 to 24, 27.8% from 25 to 44, 27.6% from 45 to 64, and 13.1% 65 or older. The median age was 38.6 years. For every 100 females, there were 100.5 males. For every 100 females age 18 and over, there were 102.3 males.

The median household income was $48,837 and the median family income was $56,107. Males had a median income of $43,287 versus $32,843 for females. The per capita income for the county was $22,192. About 8.3% of families and 10.6% of the population were below the poverty line, including 13.2% of those under age 18 and 9.5% of those age 65 or over.

2020 census

St. Clair County racial composition
Race	Num.	Perc.
White (non-Hispanic)	74,962	82.28%
Black or African American (non-Hispanic)	8,617	9.46%
Native American	249	0.27%
Asian	655	0.72%
Pacific Islander	20	0.02%
Other/Mixed	4,025	4.42%
Hispanic or Latino	2,575	2.83%