Charles H. Beaubien, also known as Alexis Beaubien, Don Carlos Beaubien and Charles Trotier, was a Canadian-born American fur trader who was one of two investors who owned 2,700,000 acres (11,000 km2) of northeastern New Mexico and southeastern Colorado in the Beaubien-Miranda and Sangre de Cristo Land Grants. He served for a time on the New Mexico Territorial Supreme Court.

The Sangre de Cristo Land Grant in the San Luis Valley of southern Colorado and northern New Mexico consists of 1,000,000 acres (4,000 km2) of mostly arid land. It was awarded by the government of New Mexico to the Beaubien family in 1843. The land grant was originally settled by Hispanics from New Mexico. Since the incorporation of the area of the grant into the United States in 1848, legal disputes between the descendants of the Hispanic settlers and Anglo ranchers about ownership of and access to some of the land in the grant area have been frequent and continued into the 21st century.