Stephenville is a city located in Erath County Texas. It is also the county seat of Erath County. With a 2020 population of 21,959, it is the 133rd largest city in Texas and the 1720th largest city in the United States . Stephenville is currently growing at a rate of 1.65% annually and its population has increased by 28.24% since the most recent census, which recorded a population of 17,123 in 2010. Stephenville reached it's highest population of 21,959 in 2021. Spanning over 12 miles, Stephenville has a population density of 1,847 people per square mile.
The average household income in Stephenville is $62,584 with a poverty rate of 22.66%. The median rental costs in recent years comes to $926 per month, and the median house value is $141,500. The median age in Stephenville is 24.6 years, 23.8 years for males, and 26.2 years for females.