[3] As of the 2020 United States census, there were 123,416 people, 45,455 households, and 31,395 families residing in the county.

As of the 2000 United States census,[12] there were 83,529 people, 31,778 households, and 24,500 families residing in the county.

19.60% of all households were made up of individuals, and 7.50% had someone living alone who was 65 years of age or older.

[13] Over the past few election cycles Saline County has trended heavily 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.