McPherson County, Nebraska
McPherson County is a county in the U.S. state of Nebraska. As of the 2020 census, the population was 399, and was estimated to be 369 in 2025, making it the least populous county in Nebraska and the fifth-least populous county in the United States. The county seat and the largest city is Tryon.
McPherson County is part of the North Platte micropolitan area.
In the Nebraska license plate system, McPherson County was represented by the prefix "90" (as it had the 90th-largest number of vehicles registered in the state when the license plate system was established in 1922).