Overview
          90,412
                  Total Population
                40.5
                  Median age
                49.98%
                  Female population %
                100.1:100
                  Gender ratio (M:F)
                55-59 years
                  Largest age group
                55.2
                  Total dependency ratio
                White
                  Largest racial group
                2,263
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
St. Clair County's population is old compared to the rest of the country:
- The median age in St. Clair County is 40.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- St. Clair County's population under 18 was 22.68%, compared to the 22.51% nationwide.
- St. Clair County's elderly or the senior population (over 65 age) was 16.75% as compared to 16.04% nationwide.
- Of the total population in St. Clair County, 18.80% were under the age of 15, 17.10% aged 15 to 29, 47.35% aged 30 to 64, 15.64% aged 65 to 84, and 1.11% were 85 years of age and older.
 
Read more about St. Clair County, AL population by age ➔
Gender
There are 36 less females than males in St. Clair County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.98% females and 50.02% males in St. Clair County, AL.
- The St. Clair County, AL gender ratio is 100.1:100 i.e. 100.1 men to 100 women (1.001).
- For male population, the largest age group is 10-14 years with a population of 3,409.
- For the female population, the largest age group is 55-59 years with a population of 3,512.
 
Read more about St. Clair County, AL population by gender ➔
Race / Ethnicity
St. Clair County's population has become increasingly diverse:
- Racial distribution of St. Clair County population: 86.21% are White, 9.52% are Black or African American, 0.38% are American Indian and Alaska Native, 0.55% are Asian, 0.02% are Native Hawaiian and other Pacific Islander, 1.26% are some other race and 2.06% are multiracial.
- St. Clair County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 2,263 is Hispanic or Latino (of any race), and 88,149 (97.50% of the total population) is Non-Hispanic.
- The largest racial group in St. Clair County is White with a population of 77,943 (86.21% of the total population).
 
Read more about St. Clair County, AL population by race ➔
Year by year
St. Clair County's population has not reached its peak yet and is showing a trend of further growth:
- The peak population was 93,932 in the year 2022
- From 2000 to 2010, St. Clair County's population increased by 18,509 (28.44%), as compared to the national growth of 9.63%.
- From 2010 to 2020, St. Clair County's population increased by 8,065 (9.65%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, St. Clair County's population was lowest in year 2000 at 65,078.
 
Read more about St. Clair County, AL population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)
