Cost of Living: Thornton, CO vs Round Rock, TX (2026)

Thornton

Colorado
138
VS

Round Rock

Texas
122

Thornton is 13% more expensive than Round Rock.

$1,810/mo ↑ 6%
Median Rent
$1,713/mo ↓ 5%
$100,985/yr ↑ 4%
Median Income
$97,187/yr ↓ 4%
$482,200 ↑ 26%
Home Value
$383,700 ↓ 20%
$1,914/mo ↑ 7%
Owner Costs
$1,781/mo ↓ 7%
142,878
Population
124,288

Tax Comparison

4.4%
Income Tax
0%
2.9%
State Sales Tax
6.25%
0.51%
Property Tax
1.6%

Affordability

21.5%
rent-to-income
Affordability
21.2%
rent-to-income

Detailed Comparison

When comparing Thornton, CO and Round Rock, TX, the overall cost of living indices are 138 and 122 respectively (national median = 100). Rent is $97/month cheaper in Round Rock, saving renters about $1,164/year.

Median household income is $3,798/year higher in Thornton. Home values also differ significantly — the median in Thornton is $482,200 compared to $383,700 in Round Rock.

Texas has no state income tax, giving Round Rock residents a significant tax advantage over Colorado's 4.4% rate.

Frequently Asked Questions

Thornton vs Round Rock — common questions

Is Thornton or Round Rock cheaper to live in?
Based on our cost index, Round Rock is cheaper to live in with an index of 122 compared to 138 (US average = 100).
What is the rent difference between Thornton and Round Rock?
Median rent in Thornton is $1,810/month and in Round Rock it's $1,713/month — a difference of $97/month.
Which city has higher income, Thornton or Round Rock?
Median household income is $100,985 in Thornton and $97,187 in Round Rock. Median household income is $3,798/year higher in Thornton.
How do taxes compare between Colorado and Texas?
Colorado has 4.4% income tax, 2.9% sales tax, and 0.51% property tax. Texas has 0% income tax, 6.25% sales tax, and 1.6% property tax.
Should I move to Thornton or Round Rock?
It depends on your priorities. Thornton has a cost index of 138 with median rent of $1,810/mo, while Round Rock has a cost index of 122 with rent of $1,713/mo. Consider income potential, tax burden, and lifestyle preferences alongside raw cost data.
View Thornton details → View Round Rock details →

More Comparisons

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