Stephenville is the county seat of Erath and many residential homes can be found here.

More single-family homes can be found in Morgan Mill, Bluff Dale and Dublin. The majority of the population has homes in Stephenville and maintains farms and ranches in other areas.

Several oil and gas wells can also be seen in 5 out of 21 cities in Erath, namely Stephenville, Morgan Mill, Lingleville, Dublin, and Bluff Dale.