This analysis is based upon data of family migration histories for a sample of junior and senior high school students in the Seattle metropolitan area. It is found that the amount of residential mobility differs widely for families living in three different metropolitan subareas—the central city, an industrial-type suburb, and a residential-type suburb. In-flow migration analysis for the families provides evidence on the sources of inmigration for each sub-area, and extended study of migration experience. In general, decentralization was not found to be the dominant pattern of movement into peripheral areas for mobile families. Also, the industrial suburb resembles the central city more closely than it does the residential suburb according to the various migration criteria; further lending support for the notion and need for suburban typologies.