Travis County has had two locations named Montopolis. The first was during the Republic of Texas period north of the Colorado River. The second is today's Montopolis neighborhood in Austin, Texas south of the river. Located southeast of the city's urban core, today's neighborhood 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.