Overview
          59,892
                  Total Population
                43.4
                  Median age
                51.83%
                  Female population %
                92.9:100
                  Gender ratio (M:F)
                60-64 years
                  Largest age group
                64.4
                  Total dependency ratio
                White
                  Largest racial group
                733
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Mercer County's population is old compared to the rest of the country:
- The median age in Mercer County is 43.4, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Mercer County's population under 18 was 20.68%, compared to the 22.51% nationwide.
 - Mercer County's elderly or the senior population (over 65 age) was 21.85% as compared to 16.04% nationwide.
 - Of the total population in Mercer County, 17.33% were under the age of 15, 17.97% aged 15 to 29, 42.86% aged 30 to 64, 19.34% aged 65 to 84, and 2.51% were 85 years of age and older.
 
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Gender
There are 2,194 more females than males in Mercer County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.83% females and 48.17% males in Mercer County, WV.
 - The Mercer County, WV gender ratio is 92.9:100 i.e. 92.9 men to 100 women (0.929).
 - For male population, the largest age group is 5-9 years with a population of 2,365.
 - For the female population, the largest age group is 60-64 years with a population of 2,481.
 
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Race / Ethnicity
Mercer County's population has become increasingly diverse:
- Racial distribution of Mercer County population: 90.10% are White, 5.90% are Black or African American, 0.06% are American Indian and Alaska Native, 0.26% are Asian, 0.14% are some other race and 3.55% are multiracial.
 - Mercer County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
 - By ethnicity, 733 is Hispanic or Latino (of any race), and 59,159 (98.78% of the total population) is Non-Hispanic.
 - The largest racial group in Mercer County is White with a population of 53,963 (90.10% of the total population).
 
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Year by year
Mercer County's population has already reached its peak and is showing a trend of decline:
- The peak population was 62,917 in the year 2000
 - From 2000 to 2010, Mercer County's population decreased by 582 (0.93%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Mercer County's population decreased by 2,818 (4.52%), 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, Mercer County's population was lowest in year 2022 at 58,700.
 
Read more about Mercer County, WV 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)