Jackson Township is a township in Union County, Arkansas, United States. Its total population was 758 as of the 2010 United States census, a decrease of 1.56 percent from 770 at the 2000 census.
According to the 2010 Census, Jackson Township is located at (33.051999, -92.625904). It has a total area of ; of which is land and is water (0.38%). As per the USGS National Elevation Dataset, the elevation is .