Round Rock, TX 78664 ZIP Code Profile

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Round Rock, TX

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ZIP Code 78664: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Round Rock, TX 78664

Not Acceptable, USPS
Old Round Rock, TX 78664
Three Point, TX 78664

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 1,595
  • Single Family Addresses: 15,280
  • Multi-Family Addresses: 5,640
  • County: Williamson County
  • Centroid: Latitude 30.512, Longitude -97.67
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes

ZIP Code 78664 has segments in 2 Counties (Travis, Williamson).

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


78664 ZIP Code Map

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Round Rock, TX 78664 Data & Demographics (As of July 1, 2017)


Total Population 61,962
Daytime Population: Workers 42,826
Daytime Population: Residents 30,436
Total Daytime Population (TDP) 73,262
Ratio TDP/Total Population1 1.18
Population in Households 61,568
Population in Familes 51,514
Population in Group Qrtrs 394
Population Density2 3,560
Diversity Index3 78


Median Household Income $67,665
Average Household Income $88,090
Per Capita Income $31,411


Total Housing Units 22,921 (100%)
Owner Occupied HU 11,656 (50.9%)
Renter Occupied HU 10,258 (44.8%)
Vacant Housing Units 1,007 ( 4.4%)
Median Home Value $176,219
Average Home Value $227,136


Total Households 21,914
Average Household Size 2.81
Family Households 15,514
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 2.13% 2.3%
Households 2.21% 2.38%
Families 2.11% 2.28%
Median Household Income   2.22%
Per Capita Income   2.46%

Round Rock, TX 78664 - Peer Comparisons by Rank and Percentile

The table below compares 78664 to the other 1,848 ZIP Codes in Texas by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 51 97th
Population Density # 235 87th
Diversity Index # 210 89th
Median Household Income # 313 83rd
Per Capita Income # 492 73rd

Additional comparisons and rankings can be made with a VERY EASY TO USE Texas Census Data Comparison Tool.

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