Gleason is an unincorporated community in Lincoln County, Wisconsin, United States. Gleason is situated on Wisconsin Highway 17 northeast of Merrill, in the town of Russell. Gleason has a post office with ZIP code 54435. The Estonian Evangelical Martin Luther Church, the first Estonian church built in America, is located in Gleason. Gleason is known as the “Trout Fishing Capital of the World” boasting the world record brook trout and great trout fishing on many of the local streams.