Greenland Township is one of thirty-seven townships in Washington County, Arkansas, USA.

[2] As of the 2020 census, its total population was 1,213.

[3] According to the United States Census Bureau, Greenland Township covers an area of 23.2 square miles (60 km2), with 23.1 square miles (60 km2) of land and 0.1 square miles (0.26 km2) of water.

[2] The township contains Boone Cemetery, Rieff Chapel Cemetery, Shaeffer Cemetery, Baptist Ford (Union) Cemetery, and Wilson Cemetery.