In this paper an intervening opportunities model with spatial dominance is developed. The usual assumption in spatial theory is that decision makers are in¯uenced not just by the size of a destination or distance but by these two factors in combination, that is, spatial dominance. Decision-makers will have more knowledge about, and clearly perceive destinations that exert the greatest amount of spatial dominance on their origins, just as they would primate cities. Thus destinations are ranked in terms of the spatial dominance calculated for each destination. Empirical veri®cation of the model utilizes state-to-state migration¯ow data for the US. Calibration results compare favourably with the traditional intervening opportunities model and the production constrained gravity model.