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ZIP Code · TX

ZIP 78664

Pop. 62,060·Williamson County·329th most expensive ZIP in Texas
Median rent (all units)
$1,621/mo
Year-over-Year
+1.9%
Month-over-Month
+3.5%
vs US Median
-$344
Rising (Monthly)
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Most AffordableMost Expensive
ZIP 78664 · $1,621
More affordable than 65% of US ZIP codes · National median $1,965/mo
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Medians by bedroom

Rent by unit size

Studio
$1,420
1 BR
$1,510
2 BR
$1,790
3 BR
$2,270
4 BR+
$2,670
Research median
$1,790/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: July 20, 2026

Annual cost
$19,452/yr
At $1,621/mo median
Location
StateTX
CountyWilliamson County
Rent Market Meter
Strong Landlord's Market
Renter's MarketBalancedLandlord's Market
Rents are up 1.9% year-over-year. Expect competition, and move quickly to lock in terms.
Based on rent-price momentum (+1.9% YoY, +3.5% MoM), not inventory.
Demographics

Who lives here

ZIP 78664 (Round Rock, TX) is roughly split between renters and owners, 36.4% of residents hold a bachelor's degree or higher.

Population
62,060
Median income
$87,417
Median age
35.1
Renters
46.3%
Age distribution
22.3%
27.6%
28.5%
Under 1822.3%
18–3427.6%
35–5428.5%
55–6410.7%
65+10.8%
Gender
48.4%
51.6%
Male48.4%
Female51.6%
Race & ethnicity
47.6%
14.1%
35.8%
White47.6%
Black14.1%
Hispanic35.8%
Asian6%
Education (25+)
22.2%
31.3%
36.4%
No HS diploma10.1%
HS diploma22.2%
Some college31.3%
Bachelor's+36.4%
Housing tenure
53.7%
46.3%
Owner53.7%
Renter46.3%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 78664 in Round Rock, TX has changed in 5 years

Rent
$1,350 → $1,621
up 20.1%
Income
$80,403 → $87,417
up 8.7%
Population
60,152 → 62,060
up 3.2%
Renter share
44.9% → 46.3%
+1.4 pts
Bachelor's+
32.4% → 36.4%
+4.0 pts
Median age
34.6 → 35.1
+0.5 yrs

Five years ago, renters in ZIP 78664 in Round Rock, TX paid around $1,350 a month. That figure now sits near $1,621, up 20.1% from the 2021 baseline. Local incomes tracked alongside that move, going from a median of $80,403 in 2021 to $87,417 more recently. Because rent grew faster than wages over the same span, the affordability picture has tightened relative to 2021. Census counts show ZIP 78664 in Round Rock, TX adding about 1,908 residents over the five-year window, up 3.2% on net. Bachelor's-degree-or-higher attainment moved from 32.4% to 36.4% across the same window. These shifts give renters and would-be renters a longer baseline for sizing up today's listings against the ZIP 78664 in Round Rock, TX market of 2021.

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Local insights

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About renting in ZIP 78664

Last updated: July 20, 2026

ZIP code 78664 covers Round Rock, TX. The median rent here is $1,621/mo as of July 2026. A 1-bedroom rents for a median of $1,510/mo. A 2-bedroom rents for a median of $1,790/mo.

At 22% of local median household income ($87,417/yr), ZIP 78664 ranks as affordable compared to the national benchmark of 30%. Rents have increased 1.9% over the past year.

FAQ

Frequently asked questions

How much is rent in ZIP code 78664?

As of July 20, 2026, the median monthly rent in ZIP 78664 (Round Rock, TX) is $1,621. This is based on aggregated data from public sources and community submissions.

How does ZIP 78664 rent compare to the US average?

ZIP 78664's median rent of $1,621/mo is $344 (18%) below the US national median of $1,965/mo.

How does ZIP 78664 compare to other ZIPs in Texas?

ZIP 78664 falls in the middle range for Texas, ranking #329 out of 689 ZIPs at $1,621/mo.

How much income do you need to rent in ZIP 78664?

To keep rent at or below 30% of gross income, you would need to earn at least $65,000/year (~$31/hour full-time) to afford the median rent of $1,621/mo in ZIP 78664. The local median household income is $87,417/yr, meaning the typical household meets that threshold.

Is rent going up or down in ZIP 78664?

Rent in ZIP 78664 has increased 1.9% over the past year as of July 20, 2026, putting upward pressure on renter budgets.

Is ZIP 78664 an affordable place to rent?

ZIP 78664 is considered very affordable for renters. At $1,621/mo, rent takes approximately 22% of the local median household income ($87,417/yr). The standard benchmark is 30%. ZIP 78664 falls comfortably within that range.

What percentage of ZIP 78664 residents rent vs. own?

According to Census data, approximately 46.3% of ZIP 78664 households are renters, while 53.7% are owner-occupied. ZIP 78664 leans toward homeownership, which can mean a smaller rental inventory.

How does ZIP 78664 compare to the rest of Round Rock?

ZIP 78664 is more affordable than Round Rock overall. At $1,621/mo, it's $92 below the Round Rock citywide median of $1,713/mo.

When was rent data for ZIP 78664 last updated?

Rent data for ZIP 78664 reflects July 20, 2026. RentDataNow refreshes all data monthly using public and private datasets.
Income Affordability
22%
VERY AFFORDABLE

At $1,621/mo, rent takes ~22% of ZIP 78664's median household income ($87,417/yr). The standard benchmark is 30%.

ZIP 78664 22%Benchmark 30%
State income taxNone
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Schools nearby

Public schools near ZIP 78664 (Round Rock, TX)

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