2020 census
As of the 2020 United States census, the county had a population of 25,656. Of the residents, 24.2% were under the age of 18 and 19.5% were 65 years of age or older; the median age was 40.7 years. For every 100 females there were 96.6 males, and for every 100 females age 18 and over there were 93.8 males.
The racial makeup of the county was 73.7% White, 2.2% Black or African American, 8.5% American Indian and Alaska Native, 0.5% Asian, 4.2% from some other race, and 10.9% from two or more races. Hispanic or Latino residents of any race comprised 9.6% of the population., there were 27,210 people, 10,865 households, and 7,605 families residing in the county. The population density was . There were 12,641 housing units at an average density of . The racial makeup of the county was 84.93% White, 2.55% Black or African American, 7.36% Native American, 0.23% Asian, 0.04% Pacific Islander, 1.54% from other races, and 3.34% from two or more races. 3.40% of the population were Hispanic or Latino of any race.
There were 10,865 households, out of which 30.70% had children under the age of 18 living with them, 56.40% were married couples living together, 10.10% had a female householder with no husband present, and 30.00% were non-families. 26.90% of all households were made up of individuals, and 14.30% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.96.
In the county, the population was spread out, with 24.80% under the age of 18, 8.10% from 18 to 24, 26.00% from 25 to 44, 23.10% from 45 to 64, and 17.90% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 92.70 males. For every 100 females age 18 and over, there were 88.80 males.
The median income for a household in the county was $28,070, and the median income for a family was $34,774. Males had a median income of $28,033 versus $18,940 for females. The per capita income for the county was $14,856. About 11.40% of families and 15.90% of the population were below the poverty line, including 18.60% of those under age 18 and 14.30% of those age 65 or over.
Politics
{| class=wikitable
! colspan = 6 | Voter Registration and Party Enrollment as of June 30, 2023
|-
! colspan = 2 | Party
! Number of Voters
! Percentage
|-
|
| Democratic
| align = center | 4,004
| align = center | 25.55%
|-
|
| Republican
| align = center | 9,402
| align = center | 59.99%
|-
|
| Others
| align = center | 2,267
| align = center | 14.46%
|-
! colspan = 2 | Total
! align = center | 15,673
! align = center | 100%
|}
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Economy
While oil and gas production are important to the county economy, agriculture has been the major industry for employment since statehood. In 1907 crops of alfalfa, broomcorn, cotton, onions, potatoes, and hay produced in the county were valued at $2.5 million. By the 1930s over had been planted with paper shelled pecan trees. By 1961 the Lindsay area harvested more broomcorn than any other region in the world, and the county slogan became "We sweep the world."