A review and synthesis of existing information were used to develop estuarine habitat models for juvenile spot (Leiostomus xanthurus). The models are scaled to produce an index of habitat suitability between 0 (unsuitable habitat) to 1 (optimally suitable habitat) for estuarine areas of the continental United States. Habitat suitability indexes (HSI's) are designed for use with the habitat evaluation procedures developed by the U.S. Fish and Wildlife Service. Guideline for juvenile spot model applications and techniques for estimating model variables are described.