Costilla County, Colorado Cities (2024)

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
San Luis16286020.97%1,1080.6Town
Fort Garland26076072.19%1,6140.4CDP
Blanca33403231.19%1851.8Town

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Costilla County, Colorado?

San Luis is the largest city in Costilla County.

What is the smallest city in Costilla County, Colorado?

Blanca is the smallest city in Costilla County.

How many cities are in Costilla County?

There are 3 cities in Costilla County, Colorado.

Frequently Asked Questions