Boston Township is one of 37 townships in Washington County, Arkansas, USA.[2] As of the 2010 census, its unincorporated population was 392.According to the United States Census Bureau, Boston Township covers an area of 31.6 square miles (82 km2) with 31.5 square miles (82 km2) of it land and 0.1 square miles (0.26 km2) of it water.The township does not contain any state highways.This article about a location in Washington County, Arkansas is a stub.