[2] In the Nebraska license plate system, Frontier County is represented by the prefix 60 (it had the sixtieth-largest number of vehicles registered in the county when the license plate system was established in 1922).

[6] As of the 2000 United States Census,[14] there were 3,099 people, 1,192 households, and 828 families in the county.

26.30% of all households were made up of individuals, and 12.30% 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 (as of 2024).

The polarization has increased in recent years with Republican candidate Donald Trump winning 85.8% of the vote in 2024, a record in the county.