Valentine is a city in Cherry County, Nebraska, United States. The population was 2,820 at the 2000 census. It is the county seat of Cherry County.
In 2007, National Geographic Adventure magazine included Valentine in its list of the best ten wilderness towns and cities.
Valentine is named for Edward K. Valentine, who as a congressman from Nebraska, was the chairman of the House Committee on Agriculture during his six years in office (1879–1885). He was instrumental in getting local settlers' grievances redressed by the federal government.