Alief is a community in Harris County, Texas, United States that is mostly within the city limits of Houston. The Alief Community Association defines the boundaries of Alief as, "Westheimer on the north, Sam Houston Tollway on the east, Fort Bend County Line on the west and Interstate 69/U.S. Highway 59 on the south," while the Alief Independent School District boundaries extend as far east as Gessner in some places. Portions of Alief are in Southwest Houston while portions of Alief are within unincorporated Harris County.