Comparison to Surrounding Areas
The median household income ($122,680) for 78665 is less than the median household income for 78681 ($137,819). But it's more than 78626 ($100,431), 78634 ($114,426), 78664 ($87,417), Williamson County ($111,340), and Round Rock city ($99,287).
| 78665 | $122,680 |
| Round Rock city | $99,287 |
| Williamson County | $111,340 |
Get Median Household Income for all Zip Codes in Texas.
The average household income ($151,837) for 78665 is less than the average household income for 78681 ($164,601). But it's more than 78626 ($119,354), 78634 ($132,144), 78664 ($114,255), Williamson County ($140,407), and Round Rock city ($130,406).
| 78665 | $151,837 |
| Round Rock city | $130,406 |
| Williamson County | $140,407 |
Get Average Household Income for all Zip Codes in Texas.
The per-capita income for 78665 is $56,191. The per capita income ($56,191) for 78665 is less than the per capita income for 78681 ($59,301). But it's more than 78626 ($43,658), 78634 ($44,705), 78664 ($43,876), Williamson County ($53,505), and Round Rock city ($50,365).
| 78665 | $56,191 |
| Round Rock city | $50,365 |
| Williamson County | $53,505 |
Get Per-Capita Income for all Zip Codes in Texas.
22.8% of households make over $200,000 a year. The percent high income households (22.8%) for 78665 is less than the percent high income households for 78681 (26.8%). But it's more than 78626 (11.6%), 78634 (13.9%), 78664 (12.9%), Williamson County (19.9%), and Round Rock city (17.4%).
| 78665 | 22.8% |
| Round Rock city | 17.4% |
| Williamson County | 19.9% |
Get High Income Households for all Zip Codes in Texas.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 78665 | $54,545 | $134,401 | $141,324 | $81,340 |
| Round Rock city | $51,424 | $103,331 | $116,510 | $68,000 |
| Williamson County | $58,884 | $125,729 | $128,070 | $75,134 |
Get Median Household Income by Age of Householder for all Zip Codes in Texas.
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All income statistics above are the most current, comparable income statistics available from the US Census Bureau and are from the American Community Survey 2024 5-year estimates. You can find this information and other demographics for 78665 on the US Census Bureau’s website. These values are in 2024 inflation-adjusted dollars and were downloaded on 29 January 2026.
Margins of error for the income data are:
| Median Household Income | Average Household Income | Per Capita Income | High Income Households | Median Household Income by Age of Householder | ||||
|---|---|---|---|---|---|---|---|---|
| under 25 | 25 to 44 | 45 to 64 | 65+ | |||||
| 78665 | +/-$7,223 | +/-$9,784 | +/-$3,364 | +/-3.0% | +/-$21,161 | +/-$8,732 | +/-$9,797 | +/-$10,058 |
| Round Rock city | +/-$4,128 | +/-$5,136 | +/-$2,138 | +/-1.6% | +/-$13,683 | +/-$7,083 | +/-$11,737 | +/-$5,586 |
| Williamson County | +/-$1,581 | +/-$1,982 | +/-$723 | +/-0.7% | +/-$4,155 | +/-$2,720 | +/-$4,233 | +/-$2,209 |