Data / Population / Marshall County

Population in Marshall County

Population in Marshall County was 4,426 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 37th highest of 66 counties in 2025.

2025, persons4,426
Change on 2024-0.2%
Rank37th of 66Counties in South Dakota ranked
Series high4,4352024
Series low4,3012020

Population in Marshall County, 2020 to 2025

CSVChart (SVG)

4,3004,3504,4004,4502020202120222023202420252020: 4,301 persons2021: 4,318 persons2022: 4,364 persons2023: 4,388 persons2024: 4,435 persons2025: 4,426 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
20254,426
20244,435
20234,388
20224,364
20214,318
20204,301

Compared with South Dakota and United States

Place2025
Marshall County4,426
South Dakota935,094
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 Marshall County?

Population in Marshall County was 4,426 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 37th highest of 66 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 Marshall County?

4,435 in 2024, the highest value since 2020 in this series.

More statistics for Marshall County

All statistics for Marshall County