Dan Seavey, also known as "Roaring" Dan Seavey, (March 23, 1865 – February 14, 1949) was a sailor, fisherman, farmer, saloon keeper, prospector, U.S. marshal, thief, poacher, smuggler, hijacker, human trafficker, and timber pirate in Wisconsin and Michigan and on the Great Lakes in the late 19th to early 20th century.