Round Rock

What Buyers Should Know

Round Rock (population ~135,000) is the largest city in Williamson County and one of the fastest-growing US cities. Dell Technologies global HQ is here. Round Rock ISD anchors the schools — over 50,000 students across the district. Estimated 2026 median home price near $495,000 — most state DPA programs require the TSAHC Heroes 115% AMI ceiling for accessibility (~$157,550 for a 4-person Austin household, the highest in Texas). See Williamson County guide for full county context.