Rio Grande County is one of the 64 counties of the U.S. state of Colorado. As of the 2010 census, the population was 11,982. The county seat is Del Norte. The county is named for the Rio Grande (Spanish language for “Big River”), which flows through the county.
According to the U.S. Census Bureau, the county has a total area of 912 square miles (2,360 km), of which 912 square miles (2,360 km) is land and 0.4 square miles (1.0 km) (0.04%) is water.
As of the census of 2000, there were 12,413 people, 4,701 households, and 3,417 families residing in the county. The population density was 14 people per square mile (5/km²). There were 6,003 housing units at an average density of 7 per square mile (3/km²). The racial makeup of the county was 73.93% White, 0.35% Black or African American, 1.26% Native American, 0.23% Asian, 0.02% Pacific Islander, 21.45% from other races, and 2.76% from two or more races. 41.67% of the population were Hispanic or Latino of any race.
There were 4,701 households out of which 35.10% had children under the age of 18 living with them, 57.80% were married couples living together, 11.20% had a female householder with no husband present, and 27.30% were non-families. 24.10% of all households were made up of individuals and 10.30% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.08.
In the county, the population was spread out with 28.10% under the age of 18, 8.00% from 18 to 24, 25.30% from 25 to 44, 23.90% from 45 to 64, and 14.70% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 97.10 males. For every 100 females age 18 and over, there were 94.40 males.
The median income for a household in the county was $31,836, and the median income for a family was $36,809. Males had a median income of $30,432 versus $23,005 for females. The per capita income for the county was $15,650. About 11.30% of families and 14.50% of the population were below the poverty line, including 18.40% of those under age 18 and 11.20% of those age 65 or over.