Cost of Living: Sioux Falls, SD vs Thornton, CO (2026)

Sioux Falls

South Dakota
78
VS

Thornton

Colorado
138

Sioux Falls is 43% cheaper than Thornton.

$993/mo ↓ 45%
Median Rent
$1,810/mo ↑ 82%
$74,714/yr ↓ 26%
Median Income
$100,985/yr ↑ 35%
$271,400 ↓ 44%
Home Value
$482,200 ↑ 78%
$1,122/mo ↓ 41%
Owner Costs
$1,914/mo ↑ 71%
197,642
Population
142,878

Tax Comparison

0%
Income Tax
4.4%
4.2%
State Sales Tax
2.9%
1.28%
Property Tax
0.51%

Affordability

15.9%
rent-to-income
Affordability
21.5%
rent-to-income

Detailed Comparison

When comparing Sioux Falls, SD and Thornton, CO, the overall cost of living indices are 78 and 138 respectively (national median = 100). Rent is $817/month cheaper in Sioux Falls, saving renters about $9,804/year.

Median household income is $26,271/year higher in Thornton. Home values also differ significantly — the median in Sioux Falls is $271,400 compared to $482,200 in Thornton.

South Dakota has no state income tax, giving Sioux Falls residents a significant tax advantage over Colorado's 4.4% rate.

Frequently Asked Questions

Sioux Falls vs Thornton — common questions

Is Sioux Falls or Thornton cheaper to live in?
Based on our cost index, Sioux Falls is cheaper to live in with an index of 78 compared to 138 (US average = 100).
What is the rent difference between Sioux Falls and Thornton?
Median rent in Sioux Falls is $993/month and in Thornton it's $1,810/month — a difference of $817/month.
Which city has higher income, Sioux Falls or Thornton?
Median household income is $74,714 in Sioux Falls and $100,985 in Thornton. Median household income is $26,271/year higher in Thornton.
How do taxes compare between South Dakota and Colorado?
South Dakota has 0% income tax, 4.2% sales tax, and 1.28% property tax. Colorado has 4.4% income tax, 2.9% sales tax, and 0.51% property tax.
Should I move to Sioux Falls or Thornton?
It depends on your priorities. Sioux Falls has a cost index of 78 with median rent of $993/mo, while Thornton has a cost index of 138 with rent of $1,810/mo. Consider income potential, tax burden, and lifestyle preferences alongside raw cost data.
View Sioux Falls details → View Thornton details →

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