[5] In the Nebraska license plate system, Franklin County is represented by the prefix 50 (it had the 50th-largest number of vehicles registered in the county when the license plate system was established in 1922).

The Republican River flows eastward through the southern part of Franklin County.

[7] As of the 2000 United States Census,[13] there were 3,574 people, 1,485 households, and 1,021 families in the county.

29.20% of all households were made up of individuals, and 16.00% had someone living alone who was 65 years of age or older.

Franklin County voters have been reliably Republican for decades.

In no national election since 1964 has the county selected the Democratic Party candidate (as of 2024).