[2] Ouachita County is part of the Camden, AR Micropolitan Statistical Area.

As in much of the rest of the South, conservative whites, who constitute the majority of the population in the county, have shifted into the Republican Party.

In 1972, U.S. President Richard M. Nixon became the first Republican presidential nominee in the 20th century to win a majority in Ouachita County.

As of the 2020 United States census, there were 22,650 people, 9,658 households, and 6,009 families residing in the county.

28.00% of all households were made up of individuals, and 13.50% had someone living alone who was 65 years of age or older.

Over the past few election cycles Ouachita County has trended towards the GOP.

Each township includes unincorporated areas; some may have incorporated cities or towns within part of their boundaries.

However, the United States census does list Arkansas population based on townships (sometimes referred to as "county subdivisions" or "minor civil divisions").

Each town or city is within one or more townships in an Arkansas county based on census maps and publications.