This final report (NOAA Technical Memorandum NMFS-NE-162) from the Northeast Fisheries Science Center compiles stock assessment information for marine mammals in US Atlantic/ Gulf of Mexico waters. Edited by G.T. Waring, J.M. Quintal, and S.L. Swartz, the recent report is fifth in its series and includes new information on population size, mortality estimates, genetics, human interactions (ship strikes to whales), and first-time abundance estimates for Western North Atlantic stocks of Atlantic Spotted and Pantropical Spotted Dolphins.