2300 Old Settlers Blvd, Round Rock, TX 78665 – Round Rock. ft. property located at 2300 E Old Settlers Blvd, Round Rock, TX 78665. BUILDING. 78665. Zillow predicts the home values in 78664 will increase 7.4% (↑) in the next year. Learn more. Property Rating. It is a 0.13 Acre(s) Lot, 1,353 SQFT, 3 Beds, 2 Full Bath(s) in R471O1 Alexa Smith. In addition, school data is obtained from a third party vendor and not guaranteed to be accurate, up to date or complete.