Data / Population / Costilla County

Population in Costilla County

Population in Costilla County was 3,679 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 55th highest of 64 counties in 2025.

2025, persons3,679
Change on 2024+0.2%
Rank55th of 64Counties in Colorado ranked
Series high3,6792025
Series low3,4992020

Population in Costilla County, 2020 to 2025

CSVChart (SVG)

3,4503,5003,5503,6003,6503,7002020202120222023202420252020: 3,499 persons2021: 3,607 persons2022: 3,602 persons2023: 3,618 persons2024: 3,673 persons2025: 3,679 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
20253,679
20243,673
20233,618
20223,602
20213,607
20203,499

Compared with Colorado and United States

Place2025
Costilla County3,679
Colorado6,012,561
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 Costilla County?

Population in Costilla County was 3,679 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 55th highest of 64 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 Costilla County?

3,679 in 2025, the highest value since 2020 in this series.

More statistics for Costilla County

All statistics for Costilla County