Old Round Rock Real EstateOld Round Rock real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Old Round Rock real estate agent to arrange a tour today! Old Round Rock, Texas has a population of 58,184. The median household income in Old Round Rock, Texas is $76,295. The median household income for the surrounding county is $79,123 compared to the national median of $57,652. The median age of people living in Old Round Rock is 33.9 years. Old Round Rock WeatherThe average high temperature in July is 94.7 degrees, with an average low temperature in January of 36.7 degrees. The average rainfall is approximately 35.1 inches per year, with 0 inches of snow per year. Nearby Homes for Sale |