Montopolis is a neighborhood in Austin, Texas. Located southeast of the city's urban core, Montopolis is in ZIP code 78741. Montopolis is bounded by Lake Lady Bird on the north, by Grove Street and the Pleasant Valley neighborhood on the west, to the south by Texas State Highway 71, and by U.S. Route 183 on the east. The southeast corner abuts Austin-Bergstrom International Airport. Montopolis is in City Council District 3.