In the Nebraska license plate system, Lincoln County is represented by the prefix 15 (it had the fifteenth-largest number of vehicles registered for a state county when the license plate system was established in 1922).

Lincoln County is located in the Nebraska Sandhills, a region of mixed-grass prairie on grass-stabilized dunes.

The land is generally given to agriculture, with considerable center pivot irrigation and cattle ranching.

[6] As of the 2020 United States Census[21] there were 34,674 people and 14,485 households in the county.

As of the 2000 United States Census[21] there were 34,632 people, 14,076 households, and 9,444 families in the county.

28.30% of all households were made up of individuals, and 11.60% had someone living alone who was 65 years of age or older.

Lincoln County voters generally vote Republican.