Data / Population / Mercer County

Population in Mercer County

Population in Mercer County was 57,503 in 2025, according to the U.S. Census Bureau. That is down 0.1% from 2024. That is the 9th highest of 55 counties in 2025.

2025, persons57,503
Change on 2024-0.1%
Rank9th of 55Counties in West Virginia ranked
Series high59,5282020
Series low57,5032025

Population in Mercer County, 2020 to 2025

CSVChart (SVG)

57.5K58K58.5K59K59.5K60K2020202120222023202420252020: 59,528 persons2021: 59,184 persons2022: 58,617 persons2023: 58,090 persons2024: 57,552 persons2025: 57,503 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202557,503
202457,552
202358,090
202258,617
202159,184
202059,528

Compared with West Virginia and United States

Place2025
Mercer County57,503
West Virginia1,766,147
United States341,784,857

Rankings

Definition

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

What is the population in Mercer County?

Population in Mercer County was 57,503 in 2025, according to the U.S. Census Bureau. That is down 0.1% from 2024. That is the 9th highest of 55 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved by Invokely on 2026-10-08.

What was the highest population in Mercer County?

59,528 in 2020, the highest value since 2020 in this series.

More statistics for Mercer County

All statistics for Mercer County