Salary needed
A $50,000 salary in Cook County, IL would need to be about $42,255 in St. Clair County, IL, or $7,745 less, to match the modeled cost ratio.
Cook County, IL vs St. Clair County, IL: Cost of Living Difference
Is it cheaper?
St. Clair County, IL is cheaper than Cook County, IL.
Moving to St. Clair County, IL is estimated to save $8,579 per year.
Cheaper County
St. Clair County, ILSave about $8,579 per year.Salary needed
$50,000 in Cook County, IL is about $42,255 in St. Clair County, IL.
Biggest drivers
Transport increases by $2,004 per year. Housing saves $6,248 per year.
Housing: $6,248 lower in St. Clair County, IL
Taxes: $2,215 lower in St. Clair County, IL
Childcare: about the same in both counties
Healthcare: $500 higher in St. Clair County, IL
Food: $520 lower in St. Clair County, IL
Transport: $2,004 higher in St. Clair County, IL
Cook County, IL→St. Clair County, IL
Equivalent salary in St. Clair County, IL
$42,255
-15.49% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Cook County, IL: $102,297
Median Income in St. Clair County, IL: $92,727
Living Index in Cook County, IL 54.16%
Living Index in St. Clair County, IL 50.49%
This estimate matches your purchasing power (equivalent salary) when moving from Cook County, IL to St. Clair County, IL.
* Living index is estimated as (estimated total cost / area median income) * 100. A living index above 100% means modeled costs exceed median income.
Cost of Living Breakdown by Category
Summary
Moving from Cook County, IL to St. Clair County, IL is estimated to save $8,579 per year. A $50,000 salary in Cook County, IL would have similar purchasing power to about $42,255 in St. Clair County, IL. The largest savings come from housing and taxes.
This is a -15.49% decrease in modeled annual costs. Housing is $6,248 per year lower (-36.37%); Taxes is $2,215 per year lower (-18.88%).
Below we break down the annual categories behind the difference using Economic Policy Institute 2026 Family Budget data.
Why this comparison matters
These notes use the actual annual cost differences between Cook County, IL and St. Clair County, IL, so the page highlights the budget tradeoffs behind the total.
Affordability vs median income
Modeled annual costs equal about 54.2% of median family income in Cook County, IL and 50.5% in St. Clair County, IL. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Housing
Housing is $6,248 per year lower in St. Clair County, IL than in Cook County, IL. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether St. Clair County, IL changes their baseline budget.
Food
Food is $520 per year lower in St. Clair County, IL than in Cook County, IL. Food costs affect weekly cash flow, so even a smaller annual gap in St. Clair County, IL can show up quickly for households that cook most meals at home.
Transportation
Transportation is $2,004 per year higher in St. Clair County, IL than in Cook County, IL. Transportation matters for commuters because driving distance, vehicle costs, and transit access can change how much of a salary is left after getting around St. Clair County, IL.
Healthcare
Healthcare is $500 per year higher in St. Clair County, IL than in Cook County, IL. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if St. Clair County, IL changes provider networks or plan options.
Other necessities
Other necessities is $2,101 per year lower in St. Clair County, IL than in Cook County, IL. Other necessities cover everyday basics, so changes in St. Clair County, IL help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in Cook County, IL and St. Clair County, IL, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in St. Clair County, IL, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $2,215 per year lower in St. Clair County, IL than in Cook County, IL. Taxes affect take-home pay, so the gap in St. Clair County, IL matters even if the headline salary looks similar before deductions.
What changed the most?
The following cards show the annual category differences that most affect the move to St. Clair County, IL.
Biggest Cost
Largest annual cost increase when moving to St. Clair County, IL
Annual Increase:
$2,004 per year
TRANSPORT has the largest annual increase when moving to St. Clair County, IL.
Biggest Savings
Largest annual savings when moving to St. Clair County, IL
Annual Savings:
$6,248 per year
HOUSING has the largest annual savings when moving to St. Clair County, IL.
Breakdown of price percentages per category.
Numbers are average costs per section.
| Category | Difference | |
|---|---|---|
| Housing | -36% lower | |
| Food | -11% lower | |
| Transport | 20% higher | |
| Healthcare | 10% higher | |
| Other Costs | -31% lower | |
| Childcare | 0% higher | |
| Taxes | -19% lower |
In St. Clair County, IL, modeled annual costs are $46,820 compared with $55,399 in Cook County, IL.
Overall, annual costs are lower in St. Clair County, IL. The category breakdown above shows where the move creates the most room in the budget.
In this case St. Clair County, IL and Cook County, IL are both metropolitan locations.
Use our map to visually compare multiple counties at once.
