Runaway Bay is a city in Wise County, Texas, lying at the Southern end of Lake Bridgeport. The population was 1,286 at the 2010 census.
Runaway Bay is located at 33°10′31″N 97°52′29″W (33.175379, −97.874794). According to the United States Census Bureau, the city has a total area of 6.8 square miles (18 km2), of which, 2.5 square miles (6.5 km2) of it is land and 4.3 square miles (11 km2) is water.
The city is built around an 18-hole golf course and the city's main water tower resembles a golf ball on a tee.
As of the census of 2000, there were 1,104 people, 492 households, and 348 families residing in the city. The population density was 478.5 people per square mile (184.5/km2). There were 588 housing units at an average density of 254.9/sq mi (98.3/km2). The racial makeup of the city was 98.28% White, 0.45% African American, 0.27% Native American, 0.45% Asian, 0.27% from other races, and 0.27% from two or more races. Hispanic or Latino of any race were 1.27% of the population.
There were 492 households, out of which 21.7% had children under the age of 18 living with them, 64.6% were married couples living together, 4.3% had a female householder with no husband present, and 29.1% were non-families. 24.8% of all households were made up of individuals, and 11.0% had someone living alone who was 65 years of age or older.