Mentone is an unincorporated town in and the county seat of Loving County, Texas, United States. As of 2020, the population was 22, up from a population of 19 in 2010, almost one-quarter of the county's 82 people at the time. Mentone was, until recent years, the least-populated unincorporated county seat in the United States, but lost that distinction with the 2010 census to Gann Valley, South Dakota, which had a population of 14.