ZIP 78665
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Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).
12-month history
Last updated: October 17, 2026
What the numbers show
December. Asking rents in ZIP 78665 usually run 1.4% below trend in December and 1.5% above it in August, about $49 a month apart at today's median. Based on 11 years of data.
Rent in ZIP 78665 is 8.8% below its high of $1,855 in April 2023, at $1,691 as of September 2026.
Rent in ZIP 78665 changed +2.9% over the year to September 2026. Across the 629 Texas ZIP codes Zillow tracks, the typical change was +1.2%.
From 2019 to 2024, rent in ZIP 78665 rose 23.5% while median household income rose 27.9% ($95,932 to $122,680). Income kept ahead of rent.
Rent in ZIP 78665 is 18.6% higher than in March 2020. Across the US, rent is up 37.3% over the same stretch.
Rent has risen 6 months in a row, and rose in 7 of the last 12 months.
30% of the median household income ($122,680) is $3,067 a month. That covers HUD's Fair Market Rent for up to a 3-bedroom ($2,690); a 4-bedroom is $3,160.
2nd cheapest of 3 ZIP codes in Round Rock.
ZIP 78728, 7 miles away, rents for 24% less ($1,279/mo), about $4,900 a year in savings.
From Zillow's monthly rent index (ZORI) for ZIP 78665. The seasonal pattern compares Zillow’s seasonally adjusted and unadjusted series. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.
Who lives here
ZIP 78665 (Round Rock, TX) is majority owner-occupied, has a large share of families with children, has a median income above the national average, 53.6% of residents hold a bachelor's degree or higher.
Source: U.S. Census Bureau · ACS 2024 5-Year Estimates
How ZIP 78665 in Round Rock, TX has changed in 5 years
The median rent in ZIP 78665 in Round Rock, TX stood at $1,548 in 2021 and currently runs about $1,691, reflecting a 9.2% increase over the period. Household income in the area moved from $105,407 to $122,680 across the same window, up 16.4% versus 2021. On paper, paychecks moved up faster than rent, which softens the affordability squeeze versus the 2021 baseline. The population has grown by 10.4% since 2021, moving from about 59,935 residents to roughly 66,171. Renters now make up 38.6% of households, compared with 32.9% five years ago. College-educated residents now make up 53.6% of adults here, versus 49% in 2021. Reading these numbers side by side helps frame whether current listings in ZIP 78665 in Round Rock, TX look reasonable against where the market sat half a decade ago.
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Tips for renters in ZIP 78665
Last updated: October 17, 2026
ZIP code 78665 covers Round Rock, TX. The median rent here is $1,691/mo as of October 2026. A 1-bedroom rents for a median of $1,790/mo. A 2-bedroom rents for a median of $2,120/mo.
At 17% of local median household income ($122,680/yr), ZIP 78665 ranks as affordable compared to the national benchmark of 30%. Rents have increased 2.9% over the past year.
Frequently asked questions
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How does ZIP 78665 compare to the rest of Round Rock?
At $1,691/mo, rent takes ~17% of ZIP 78665's median household income ($122,680/yr). The standard benchmark is 30%.
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