Rock County, Nebraska
Rock County is a county in the U.S. state of Nebraska. As of the 2020 census, the population was 1,262, and was estimated to be 1,259 in 2025. The county seat and the largest city is Bassett.
In the Nebraska license plate system, Rock County was represented by the prefix "81" (as it had the 81st-largest number of vehicles registered in the state when the license plate system was established in 1922).