Winamac is a town in Monroe Township, Pulaski County, Indiana, United States. The population was 2,490 at the 2010 census. It is the county seat of Pulaski County. The town's name came from the Indian word for "catfish." Winamac is located at 413N8636W / 41.050N 86.600W / 41.050; -86.600 (41.0525, -86.6044). According to the 2010 census, the town has a total area of 1.36 square miles (3.5km2), all land.