Gray County is part of the Pampa Micropolitan Statistical Area.
Gray County was the center of the White Deer Lands Management Company, which ceased operations in 1957. The history of the company is the theme of the White Deer Land Museum in Pampa, but company archives are at the Panhandle-Plains Historical Museum in Canyon. Timothy Dwight Hobart, the White Deer land agent from 1903-1924, was elected mayor of Pampa in 1927.
As of the census of 2000, there were 22,744 people, 8,793 households, and 6,049 families residing in the county. The population density was 24 people per square mile (9/km²). There were 10,567 housing units at an average density of 11 per square mile (4/km²). The racial makeup of the county was 82.15% White, 5.85% Black or African American, 0.94% Native American, 0.39% Asian, 0.02% Pacific Islander, 8.23% from other races, and 2.42% from two or more races. 13.01% of the population were Hispanic or Latino of any race.
There were 8,793 households out of which 30.00% had children under the age of 18 living with them, 57.00% were married couples living together, 9.00% had a female householder with no husband present, and 31.20% were non-families. 28.70% of all households were made up of individuals and 15.30% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.93.
In the county, the population was spread out with 24.00% under the age of 18, 8.40% from 18 to 24, 27.20% from 25 to 44, 22.30% from 45 to 64, and 18.10% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 104.00 males. For every 100 females age 18 and over, there were 103.70 males.
The median income for a household in the county was $31,368, and the median income for a family was $40,019. Males had a median income of $32,401 versus $20,158 for females. The per capita income for the county was $16,702. About 11.20% of families and 13.80% of the population were below the poverty line, including 17.60% of those under age 18 and 9.60% of those age 65 or over.