Western pond turtles prefer marshes, streams, rivers, ponds and lakes. They need sparse vegetation nearby for digging nests and like to bask on logs.
Population declines are due to habitat loss, degradation of nesting areas by invasive plants, competition from non-native turtles and disease. Predators include raccoons and invasive bullfrogs and fish.
Western pond turtles are Oregon Conservation Strategy Species in the Coast Range, East and West Cascades, Klamath Mountains and Willamette Valley ecoregions.