Cowlitz may refer to:
People Cowlitz people, an indigenous people of the Pacific Northwest Cowlitz language, member of the Tsamosan branch of the Coast Salish family of Salishan languages Cowlitz Indian Tribe, a federally recognized tribe of Cowlitz people
Places Cowlitz County, Washington Cowlitz Falls Dam, a 70 megawatt hydroelectric dam in Lewis County, Washington Cowlitz Chimneys Cowlitz Glacier Cowlitz Landing, Washington, former name of Toledo, Washington Cowlitz River, a tributary of the Columbia River Cowlitz–Natches Road
Other Columbia and Cowlitz Railroad Cowlitz Black Bears, baseball team Cowlitz (HBC vessel), see Hudson's Bay Company vessels