Learn About
The Commemorative
Quarter for
The Commemorative Quarter for Colorado

Time Zone: Costilla County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.

The community of San Luis is the Seat for Costilla County.

Costilla County is one of the original counties of Colorado and was founded November 1, 1861.

From the Census Estimates for 2009, <1> Costilla had a population of 3,148 people. This is a decrease of 14.06% since the last Census (which gave a population of 3,663 people in 2000).

At the time of the 2000 Census, Costilla represented 0.09% of the total population of Colorado, making it the state's 54th most populous county (out of 64 counties).

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
20103,524-3.79%+11.94% since 2009
20093,148-14.06%-3.02% since 2008
20083,246-11.38%-1.73% since 2007
20003,663The Last Census

More information can be found on the Costilla County Census Page for Costilla County.


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Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

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<2>All Quarter-dollar coin images from the United States Mint.

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