According to the U.S. Census Bureau, the community has an area of 3.494 square miles (9.05 km2), all land.[4]
Prior to 2010, the Census Bureau included both Brownsville and Bawcomville in the Brownsville-Bawcomville census-designated place for statistical purposes.
Much of Brownsville CDP is zoned to Riser Elementary School, while other parts are zoned to Riverbend Elementary School, and some parts to the southeast are zoned to Lenwil Elementary School. They feed into Riser Middle School and West Monroe High School.[8]