Despite concern with turnover in the U.S. House of Representatives, few scholars have attempted to view turnover in historical perspective or in all its forms. Confusion over the basic facts has impeded attempts to explain and evaluate levels of turnover. We present a broad descriptive overview of turnover over the entire history of the U.S. House in terms of the levels of overall turnover, forms thereof, and patterns, particularly within party periods. The findings include that turnover has declined over the years but not in a continuous fashion and not evenly among the different forms, that general election defeat is not the primary form of turnover, that common methods of reporting turnover magnify the apparent importance of electorally based turnover, and that turnover varies systematically by party period. A research agenda is proposed for explanatory work on turnover including strategic retirement and the impact of partisan realignments on levels and forms of turnover.