Those of Hispanic or Latino origin made up 44.1% of the population. In terms of ancestry, 10.8% were German, 8.8% were Irish, 8.5% were English, and 7.0% were American. Of the 20,411 households, 35.7% had children under the age of 18 living with them, 50.3% were married couples living together, 13.0% had a female householder with no husband present, 30.0% were non-families, and 25.5% of all households were made up of individuals. The average household size was 2.59 and the average family size was 3.08. The median age was 37.3 years. The median income for a household in the county was $46,583 and the median income for a family was $56,646. Males had a median income of $49,788 versus $30,158 for females. The per capita income for the county was $24,587. About 9.2% of families and 13.6% of the population were below the poverty line, including 16.7% of those under age 18 and 10.6% of those age 65 or over. Within the Myst and series of computer games, Eddy County is the location of The Cleft, a fissure near a dormant volcano leading down to the large D'ni Cavern. This is most likely a reference to Carlsbad Caverns National Park.