[3] In the Nebraska license plate system, Thomas County is represented by the prefix 89 (it had the eighty-ninth-largest number of vehicles registered in the county when the license plate system was established in 1922).

The terrain of Thomas County consists of rolling hills, sloping to the east.

[4] As of the 2000 United States Census,[12] there were 729 people, 325 households, and 216 families in the county.

The racial makeup of the county was 99.45% White, 0.27% Native American, and 0.27% from two or more races.

31.40% of all households were made up of individuals, and 16.60% had someone living alone who was 65 years of age or older.

In no national election since 1936 has the county selected the Democratic Party candidate.