Results of fecal flotation assays from samples opportunistically collected from brown bears (Ursus arctos) in 2013–17 from four sites in Alaska, USA: Gates of the Arctic National Park and Preserve (GAAR), Katmai National Park (KATM), Kodiak Island (KOD), and Lake Clark National Park and Preserve (LACL). Multiple samples collected from the same animal are included to fully represent the data collected in this study. Age was not estimated for two individuals.