Prehistoric cultural affiliation(s) include Pueblo Iii, Navajo, Basketmaker, Archaic, Anasazi, Chacoan Culture and Early Navajo Period dating back to 3999 BC.
Some of the country's most noteable architects helped create the San Juan County places including unknown, Clarence Brown, James McGee, Wissler, Clark, et al. and Earl Morris. Prominent architectural styles found in San Juan Country are Italianate, Queen Anne and Bungalow/Craftsman.