Valentine is a city in Cherry County, Nebraska, United States. The population was 2,737 at the 2010 census. It is the county seat of Cherry County.

Cherry County is a county located in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 5,455. Its county seat is Valentine. The county was named for Lt. Samuel A. Cherry, an Army officer who was stationed at Fort Niobrara and who had been killed in South Dakota in 1881. Cherry County is in the Nebraska Sandhills. It is the largest county in the state at nearly 6,000 square miles (16,000 km2), larger than the state of Connecticut.