This assessment provided the data and analysis to make habitat-type-specific priorities for Puget Sound listed Chinook salmon within WRIA 6. In consultation with the WRIA 6 Lead Entity TAG, the results of this assessment were translated into ranking criteria for projects evaluated for funding. The principal goal of this project is to inform the next update to the WRIA 6 Salmon Recovery Plan by providing a WRIA-wide analysis and synthesis of salmon habitat use (distribution by habitat type) and salmon origins. Filling these data gaps will empower the Lead Entity to evaluate and prioritize restoration and protection actions based upon known habitat use and/or for a targeted population. Thus, managers will know what they are accomplishing towards salmon recovery with their work plans. The specific objectives accomplished by this study are: 1) Collected wild juvenile Chinook salmon in spring and summer from a range of locations, times, and estuarine habitat types in WRIA 6 using appropriate sampling methods; 2) Identified the origins of juvenile Chinook salmon obtained from each space/time stratum using microsatellite DNA analyses; 3) Compiled and synthesized all existing use juvenile Chinook salmon data for Island County (Stillaguamish Tribe, Wild Fish Conservancy, NOAA Fisheries), and included these data in final analysis; 4) Provided local, regional, and international managers with information on stock-specific use of estuarine habitats by juvenile Chinook.