This paper focuses on racial successions in individual housing units. Racial successions, defined as successive occupancies by different race heads of households, are seen as the basic units of the processes of racial invasion-and-succession, and reinvasion. The conceptual framework proposed by London and recent ecological studies are used to generate hypotheses concerning the likelihood of racial succession. Nationwide Annual Housing Survey data are used to test the hypotheses, making use of log-linear and logistic regression models. The findings show that white-to-black successions are more likely to occur in older, poorer quality, central city housing units, consistent with the hypotheses. Black-to-white successions, however, occur more frequently in noncentral city, better quality units; units not predicted by the reinvasion model.