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Round Rock

1. Round Rock, Arizona, United States [Place] is in Apache County; location is 36°30'47"N 109°28'22"W; elevation is 5,350 feet; was named in year 1915 [SourceGSP]
2. Round Rock, Texas, United States [City]; population was 30,923 in 1990; housing units was 11,699 in 1990; location is 30°31'N 97°40'W; land area is 19.11 square miles (12,232 acres); water area is 0.11 square miles (67 acres); FIPS code is 63500 [SourceCBP]
3. Round Rock, Texas, United States [Populated Place] is in Williamson County; location is 30°30'29"N 97°40'43"W [SourceGSP]
4. Round Rock, Texas, United States Postal Service Zip Code is 78664, 78680 (Main Office Boxes), 78681 (Main Office Area 2) [SourcePSZ]