Hiawatha Township is a civil township of Schoolcraft County in the U.S. state of Michigan. The population was 1,305 in 2020. With a total land area of 277.43 square miles (718.54 km), Hiawatha Township is the third largest municipality in the state after McMillan Township and Marenisco Township.

According to the United States Census Bureau, the township has a total area of 290.87 square miles (753.35 km), of which 277.43 square miles (718.54 km) is land and 13.44 square miles (34.81 km) (4.62%) is water.

At the census of 2000, there were 1,328 people, 563 households, and 404 families residing in the township. The population density was 4.8 inhabitants per square mile (1.9/km). There were 935 housing units at an average density of 3.4 per square mile (1.3/km). The racial makeup of the township was 93.98% White, 0.08% African American, 3.92% Native American, 0.38% Asian, 0.08% from other races, and 1.58% from two or more races. Hispanic or Latinos of any race were 0.30% of the population. By the 2020 census, its population declined to 1,305.

In 2000, the median income for a household in the township was $40,156, and the median income for a family was $46,406. Males had a median income of $40,294 versus $24,853 for females. The per capita income for the township was $20,385. About 6.0% of families and 6.0% of the population were below the poverty line, including 6.1% of those under age 18 and 4.3% of those age 65 or over. The 2021 census estimates determined its median household income was $69,563.