Allison is an unincorporated community on the Southern Ute Indian Reservation in La Plata County, Colorado, United States.

[2] The Southern Ute Indian Reservation was created on November 9, 1878.

[3] The Allison, Colorado, post office operated from August 22, 1904, until November 30, 1954.

[4] The community was named after Allison Stocker, a government surveyor.

[5] Allison is now served by the Ignacio, Colorado, post office (ZIP code 81137).