Data / Population / Marion County

Population in Marion County

Population in Marion County was 55,584 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 11th highest of 55 counties in 2025.

2025, persons55,584
Change on 2024-0.2%
Rank11th of 55Counties in West Virginia ranked
Series high56,2402020
Series low55,5842025

Population in Marion County, 2020 to 2025

CSVChart (SVG)

55.4K55.6K55.8K56K56.2K56.4K2020202120222023202420252020: 56,240 persons2021: 56,068 persons2022: 55,806 persons2023: 55,826 persons2024: 55,685 persons2025: 55,584 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202555,584
202455,685
202355,826
202255,806
202156,068
202056,240

Compared with West Virginia and United States

Place2025
Marion County55,584
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.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest population in Marion County? Cite the source.
get_value {"indicator":"population","place":"us-county-54049"}
GET https://invokely.ai/api/v1/value?indicator=population&place=us-county-54049

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the population in Marion County?

Population in Marion County was 55,584 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 11th 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 Marion County?

56,240 in 2020, the highest value since 2020 in this series.

More statistics for Marion County

All statistics for Marion County