Cost of Living: San Diego, CA vs Thornton, CO (2026)

San Diego

California
197
VS

Thornton

Colorado
138

San Diego is 43% more expensive than Thornton.

$2,223/mo ↑ 23%
Median Rent
$1,810/mo ↓ 19%
$104,321/yr ↑ 3%
Median Income
$100,985/yr ↓ 3%
$848,500 ↑ 76%
Home Value
$482,200 ↓ 43%
$2,308/mo ↑ 21%
Owner Costs
$1,914/mo ↓ 17%
1,385,061
Population
142,878

Tax Comparison

13.3%
Income Tax
4.4%
7.25%
State Sales Tax
2.9%
0.71%
Property Tax
0.51%

Affordability

25.6%
rent-to-income
Affordability
21.5%
rent-to-income

Detailed Comparison

When comparing San Diego, CA and Thornton, CO, the overall cost of living indices are 197 and 138 respectively (national median = 100). Rent is $413/month cheaper in Thornton, saving renters about $4,956/year.

Median household income is $3,336/year higher in San Diego. Home values also differ significantly — the median in San Diego is $848,500 compared to $482,200 in Thornton.

Colorado has a lower income tax rate, making Thornton slightly more tax-friendly.

Frequently Asked Questions

San Diego vs Thornton — common questions

Is San Diego or Thornton cheaper to live in?
Based on our cost index, Thornton is cheaper to live in with an index of 138 compared to 197 (US average = 100).
What is the rent difference between San Diego and Thornton?
Median rent in San Diego is $2,223/month and in Thornton it's $1,810/month — a difference of $413/month.
Which city has higher income, San Diego or Thornton?
Median household income is $104,321 in San Diego and $100,985 in Thornton. Median household income is $3,336/year higher in San Diego.
How do taxes compare between California and Colorado?
California has 13.3% income tax, 7.25% sales tax, and 0.71% property tax. Colorado has 4.4% income tax, 2.9% sales tax, and 0.51% property tax.
Should I move to San Diego or Thornton?
It depends on your priorities. San Diego has a cost index of 197 with median rent of $2,223/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 San Diego details → View Thornton details →

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