This study tests the validity and reliability of the Family Adaptability and Cohesion Scale III (FACES III) in two samples of rural adolescents. The underlying theory is the linear 3-D circumplex model. The FACES III was administered to 1,632 adolescents in Grades 7 through 12 in two counties in a rural western state. The FACES III Scale and the Cohesion Scale demonstrated high internal consistency, although the Cohesion Scale was more consistently predictive of self-esteem and higher in internal consistency than was the Adaptability Scale. Findings confirmed previous methodological critiques regarding linearity, the correlation of factors, and internal consistency. The presence of two orthogonal factors was consistent with the original 3-D circumplex model, but items from the Adaptability Scale relating to changing of rules for children's roles and egalitarianism tended to be problematic. (Contains 4 tables.)