Median rent is 38% lower in Chicago ($1,380/mo vs $2,223/mo). Buying is cheaper in Chicago, where the median home runs $315,200 versus $848,500. Households earn more in San Diego ($104,321 vs $75,134 a year). Taken together, Chicago is the more affordable choice with a cost index of 105.7 against 114.6 — about 8% lower overall prices. After adjusting income for local prices, a typical paycheck stretches further in San Diego, CA.
Quick verdict
Chicago is 8% cheaper overall
Cost index: 105.7 in Chicago vs 114.6 in San Diego (US average = 100)
City A
Chicago, IL
City B
San Diego, CA
How much would you need to earn in San Diego, CA to maintain your standard of living from Chicago, IL?
Equivalent salary in San Diego, CA
$81,332
You'd need $6,332 more (8% higher).
Based on BEA Regional Price Parity (cost index) for each city's metro area. A rough estimate of overall purchasing power, not tax or take-home pay.
Metric
Chicago
Illinois
San Diego
California
👥Population
💰Median Household Income
Annual
🏠Median Gross Rent
Per month
🏡Median Home Value
📊Cost of Living Index
US avg = 100
🔑1BR Fair Market Rent
HUD FMR
🔑2BR Fair Market Rent
HUD FMR
🔑3BR Fair Market Rent
HUD FMR
🌬️Air Quality Index
Lower = cleaner
🏛️Top State Income Tax
Top marginal rate
🧾State Sales Tax
Statewide base rate
🎂Median Age
Years
✓ = better value · Sources: US Census ACS, BEA RPP, HUD FMR, EPA AirNow, Tax Foundation
Renters will find significantly cheaper housing in Chicago — median rent of $1,380/mo versus $2,223/mo in San Diego, a 38% difference. Home buyers face a steeper market in San Diego: the median home is $848,500 versus $315,200 in Chicago — 63% more expensive.
1BR Fair Market Rent
2BR Fair Market Rent
BLS OEWS 2023 — metro-level data
Illinois's top income tax rate is 4.95% versus 13.30% in California, so Chicago is more tax-friendly for high earners. Sales tax is 6.25% in Illinois and 7.25% in California; Chicago has the lower rate (local add-ons may apply in both).
Chicago
Income tax: 4.95%
Sales tax: 6.25%
San Diego
Income tax: 13.30%
Sales tax: 7.25%
Chicago has cleaner air on average: 21.0 AQI (Good) compared to 84.0 AQI (Moderate) in the other city. Lower AQI means cleaner, healthier air.
Pick Chicago if you prioritize lower overall cost of living (index 105.7 vs 114.6).
Pick San Diego if you prioritize higher median household income ($104,321/yr).
Pick Chicago if you prioritize cheaper rent ($1,380/mo median).
Pick Chicago if you prioritize cleaner air quality (avg AQI 21.0).
Is Chicago cheaper than San Diego?
Chicago is cheaper overall, with a cost of living index of 105.7 versus 114.6 (US average = 100). That means prices run about 8% lower in Chicago.
How much is rent in Chicago vs San Diego?
Median rent is $1,380/mo in Chicago, IL and $2,223/mo in San Diego, CA. Chicago, IL has the lower rent by about 38%.
Which has higher salaries — Chicago or San Diego?
Median household income is $75,134 in Chicago, IL and $104,321 in San Diego, CA. San Diego, CA has the higher median income. Note that BLS occupational wages in the table above show wages for specific jobs.
Which city has better air quality?
Chicago, IL has better air quality on average: 21.0 AQI versus 84.0 AQI. Both are EPA AirNow annual averages; lower is better.
Which has lower taxes — Chicago or San Diego?
Illinois's top income tax rate is 4.95% and California's is 13.30%. Chicago, IL has the lower rate.
What salary do I need in San Diego to match my Chicago income?
To maintain the same purchasing power, a salary of $100,000 in Chicago, IL is equivalent to roughly $108,442 in San Diego, CA (using the BEA Regional Price Parity ratio). Use the salary calculator above for any income amount.
Data last updated: December 1, 2024 · Sources: US Census ACS, BEA RPP, BLS OEWS, HUD FMR, EPA AirNow, Tax Foundation · Methodology