Rio Vista is a city in Johnson County, Texas, United States.

Texas State Highway 174 passes through the west side of the city, leading north 8 miles (13 km) to Cleburne, the county seat, and southwest 30 miles (48 km) to Meridian.

According to the United States Census Bureau, Rio Vista has a total area of 1.0 square mile (2.7 km2), of which 2.0 acres (7,995 m2), or 0.29%, are water.

As of the 2020 United States census, there were 1,008 people, 418 households, and 331 families residing in the city.

The city is served by the Rio Vista Independent School District.