Trego is a town in Washburn County, Wisconsin, United States. The population was 885 at the 2000 census. The census-designated place of Trego is located in the town.
According to the United States Census Bureau, the town has a total area of 36.8 square miles (95.2 km²), of which, 35.9 square miles (93.1 km²) of it is land and 0.8 square miles (2.2 km²) of it (2.28%) is water.
As of the census of 2000, there were 885 people, 347 households, and 242 families residing in the town. The population density was 24.6 people per square mile (9.5/km²). There were 528 housing units at an average density of 14.7 per square mile (5.7/km²). The racial makeup of the town was 96.95% White, 0.11% African American, 1.47% Native American, 0.23% Asian, 0.11% Pacific Islander, and 1.13% from two or more races. Hispanic or Latino of any race were 0.23% of the population.