Van Horn is a town in and the seat of Culberson County, Texas, United States. According to the 2010 census, Van Horn had a population of 2,063, down from 2,435 at the 2000 census. The 2020 census results detailed a decline in population to 1,941. Van Horn's official newspaper is The Van Horn Advocate. The town is the westernmost incorporated community in the United States that uses the Central Time Zone, located on the same line of longitude as Cheyenne, Wyoming, and Colorado Springs, Colorado. Its earliest sunset in the beginning of December is the latest among incorporated towns in the United States, occurring no earlier than 5:56 pm.

Culberson County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 2,188. The county seat is Van Horn. Culberson County was founded in 1911 and organized the next year. It is named for David B. Culberson, a Confederate soldier and U.S. representative.