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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

Zip Code 78664, Round Rock, TX

ZIP Code 78664 Details

Zip Code:78664
City:Round Rock
State:TX [Texas]
Multi County:Yes
City Alias(es):Round Rock
City Alias(es) To Avoid Using:Old Round Rock
Three Point
Area Code:512 / 737
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Central (GMT -06:00)
Observes Daylight Saving:Yes
Elevation:746 ft
State FIPS:48
County FIPS:491
Division:West South Central
Intro Date:<2004-10

ZIP Code 78664 2010 Census Demographics

Current Population:63,657
2010 Population:52,932
Households per ZIP Code:18,731
Average House Value:$231,800
Avg. Income Per Household:$77,679
Persons Per Household:2.81
White Population:36,648
Black Population:7,240
Hispanic Population:18,600
Asian Population:2,838
American Indian Population:883
Hawaiian Population:169
Other Population:7,609
Male Population:25,980
Female Population:26,952
Median Age:31.30 years
Male Median Age:30.60 years
Female Median Age:31.90 years

ZIP Code 78664 Other Demographics

# Residential Mailboxes:22,654
# Business Mailboxes:1,775
Total Delivery Receptacles:23,674
Number of Businesses:1588
1st Quarter Payroll:$243,582,000
Annual Payroll:$1,000,634,000
# of Employees:24,990
Water Area:0.092 sq mi
Land Area:16.577 sq mi
113th Congressional District:17|31
113th Congressional Land Area:7651.16|2154.49 sq mi
Single Family Delivery Units:3,675
Multi Family Delivery Units:5,954
# Residential Mailboxes:22,654
# Business Mailboxes:1,775
Total Delivery Receptacles:23,674

ZIP Code 78664 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 5,835 6,055 +220
Retired Workers: 3,945 4,135 +190
Disabled Workers: 815 840 +25
Widow(er)s and Parents: 375 370 -5
Spouses: 215 235 +20
Children: 485 475 -10
65+: 4,240 4,455 +215
Monthly Benefits - All: $7,951,000 $8,515,000 +$564,000
Monthly Benefits - Retired Workers: $5,855,000 $6,331,000 +$476,000
Monthly Benefits - Widow(ers): $528,000 $536,000 +$8,000

ZIP Code 78664 Statistical Areas

CBSA: 12420
CBSA Name: Austin-Round Rock-Georgetown, TX
CBSA Type: Metro
CBSA Division: 
CBSA Division Name: 
CBSA Population:1,716,289
CBSA Division Population:0
MSA: 0640
MSA Name: Austin-San Marcos, TX MSA
PMSA Name: 
City State Key:W25448
Preferred Last Line Key:W25448
78663: Previous ZIP Code
Next ZIP Code: 78665


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census American National Standards Institute (ANSI) [Last Updated: 5/1/2022],
  6. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],
  7. Centers for Medicare & Medicaid Services [Updated Yearly],