St. Louis vs Decatur: Cost of Living Comparison

Side-by-side cost comparison across 38 categories. Updated March 2026.

MO
St. Louis
87
Cost Index
Pop: 302KIncome: $44K
VS
9% diff
IL
Decatur
78
Cost Index
Pop: 71KIncome: $37K
More Affordable
Decatur
St. Louis Wins
13/38
Decatur Wins
25/38
Net Advantage
Decatur saves ~$665/mo

Should you live in St. Louis or Decatur? The cost data below will help you answer that question with confidence. Decatur wins on overall affordability — 9% cheaper across the board — but the category-by-category breakdown reveals a more interesting story. Some expenses are dramatically different between these two markets; others are almost identical.

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Overall Cost of Living Comparison

CategorySt. LouisDecaturDifference
OverallAA+Tie
HousingAA+Tie
FoodB+A+Tie
HealthcareAATie
TransportationB+ATie
UtilitiesAA+Tie

Rent, Food, and Utility Differences

🏠

Housing

79
St. Louis
Decatur saves 3%
77
Decatur

Housing costs are primarily driven by local real estate markets and land values.

🛒

Food & Groceries

90
St. Louis
Decatur saves 4%
86
Decatur

Food & Groceries costs are primarily driven by local supply chains and regional agriculture.

🏥

Healthcare

91
St. Louis
Decatur saves 10%
82
Decatur

Healthcare costs are primarily driven by local provider networks and state regulations.

🚗

Transportation

93
St. Louis
Decatur saves 16%
78
Decatur

Transportation costs are primarily driven by local public transit availability and fuel costs.

💡

Utilities

82
St. Louis
St. Louis saves 12%
92
Decatur

Utilities costs are primarily driven by local energy sources and climate demands.

🔧

Services

84
St. Louis
Decatur saves 7%
78
Decatur

Services costs are primarily driven by local labor markets and demand density.

Key Cost Comparisons

Roof ReplacementSt. Louis saves $2,621
St. Louis
$5,485
Decatur
$8,106
Start a RestaurantSt. Louis saves $68,566
St. Louis
$275,072
Decatur
$343,638
Cost of LivingDecatur saves $262
St. Louis
$3,485
Decatur
$3,223
Rent PricesDecatur saves $31
St. Louis
$1,756
Decatur
$1,725
Car InsuranceSt. Louis saves $503
St. Louis
$1,592
Decatur
$2,095
Software Developer Salary (higher = better)Decatur pays $11,099 more
St. Louis
$84,926
Decatur
$96,025

Cost of Living

St. Louis: 1Decatur: 4
CategorySt. LouisDecaturDiffWinner
Cost of Living$3,485$3,2238%Decatur (lower cost)
Rent Prices$1,756$1,7252%Decatur (lower cost)
Grocery Costs$351$3664%St. Louis (lower cost)
Utility Costs$218$2123%Decatur (lower cost)
Transportation Costs$385$25833%Decatur (lower cost)

Home Services

St. Louis: 2Decatur: 8
CategorySt. LouisDecaturDiffWinner
Roof Replacement$5,485$8,10632%St. Louis (lower cost)
HVAC Installation$4,871$5,1746%St. Louis (lower cost)
Plumbing Services$272$18233%Decatur (lower cost)
Electrical Work$352$25428%Decatur (lower cost)
Kitchen Remodel$26,231$16,50037%Decatur (lower cost)
Bathroom Remodel$12,040$10,45013%Decatur (lower cost)
House Painting$3,759$3,38610%Decatur (lower cost)
Flooring Installation$2,715$1,87631%Decatur (lower cost)
Landscaping$3,086$1,96536%Decatur (lower cost)
Fence Installation$2,758$2,34115%Decatur (lower cost)

Business Startup Costs

St. Louis: 5Decatur: 5
CategorySt. LouisDecaturDiffWinner
Start a Restaurant$275,072$343,63820%St. Louis (lower cost)
Start a Coffee Shop$137,285$174,07821%St. Louis (lower cost)
Start a Food Truck$126,607$112,26911%Decatur (lower cost)
Start a Gym$195,305$167,00814%Decatur (lower cost)
Start a Daycare$44,421$33,11625%Decatur (lower cost)
Start a Hair Salon$191,038$166,88613%Decatur (lower cost)
Start a Laundromat$245,350$277,20011%St. Louis (lower cost)
Start a Bakery$81,963$68,00417%Decatur (lower cost)
Start a Bar$345,072$358,8484%St. Louis (lower cost)
Start a Cleaning Business$14,197$14,3601%St. Louis (lower cost)

Insurance

St. Louis: 2Decatur: 2
CategorySt. LouisDecaturDiffWinner
Car Insurance$1,592$2,09524%St. Louis (lower cost)
Home Insurance$1,676$1,6124%Decatur (lower cost)
Health Insurance$579$5466%Decatur (lower cost)
Business Insurance$1,424$1,70717%St. Louis (lower cost)

Salaries & Jobs

St. Louis: 2Decatur: 3
CategorySt. LouisDecaturDiffWinner
Software Developer Salary$84,926/yr$96,025/yr12%Decatur (higher pay)
Registered Nurse Salary$68,693/yr$71,033/yr3%Decatur (higher pay)
Teacher Salary$59,274/yr$47,661/yr20%St. Louis (higher pay)
Electrician Salary$55,410/yr$51,950/yr6%St. Louis (higher pay)
Plumber Salary$43,683/yr$49,062/yr11%Decatur (higher pay)

Which City Gives You More Buying Power?

The "better" city depends on your situation. Here's how different profiles stack up:

💻

Remote Worker

Decatur

If your salary doesn't depend on location, Decatur's 9% lower costs translate directly into more savings or disposable income. Your paycheck goes further without a pay cut.

🚀

Young Professional

Decatur

Both cities are moderately priced, but Decatur's lower costs help you build savings earlier in your career when compound growth matters most.

👨‍👩‍👧‍👦

Family with Kids

Decatur

Families face multiplied costs — housing, groceries, healthcare, and transportation all scale with household size. Decatur's 9% advantage compounds across every budget category.

🏪

Small Business Owner

Decatur

Lower operating costs in Decatur mean lower break-even points. Rent, utilities, insurance, and labor all come in cheaper, giving new businesses more runway to reach profitability.

🏖️

Retiree

Decatur

On a fixed income, every percentage point matters. Decatur's lower healthcare, housing, and everyday costs help retirement savings last longer.

Salary Equivalent Between Cities

Decatur is 9% more affordable overall

Decatur wins 25 out of 38 cost categories.St. Louis has higher costs but wins 13 categories.

St. Louis
87
Decatur
78

Explore Each City

St. Louis, MO
Pop: 302K | Index: 87
View all costs →
Decatur, IL
Pop: 71K | Index: 78
View all costs →

Explore Specific Costs

Dive deeper into specific cost topics for each city:

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Frequently Asked Questions

Which city is better for remote workers?

For remote workers earning a location-independent salary, Decatur is the clear winner. The 9% cost advantage means more of your paycheck goes to savings or discretionary spending. St. Louis makes more sense if your employer adjusts pay upward for that market.

Should I move from St. Louis to Decatur?

If your income stays the same or comparable, moving from St. Louis to Decatur gives you 9% more purchasing power. That said, the decision depends on career opportunities, family ties, lifestyle preferences, and which specific costs matter most to your household. Review the category breakdown above to see which line items shift the most.

Which city has better job opportunities?

Job market strength depends on your industry. Both cities have similar cost profiles, suggesting comparable job markets. Compare specific salary categories above for your field. Median incomes are $44K (St. Louis) vs $37K (Decatur).

Is St. Louis or Decatur more affordable in 2026?

Decatur is 9% more affordable than St. Louis overall. Decatur wins 25 out of 38 cost categories. However, St. Louis may offer higher salaries in certain industries that can offset higher living costs.

About This Comparison

Data SourcesBLS Consumer Expenditure Survey, Census Bureau ACS, HUD Fair Market Rent data, BLS OEWS (salary data), and regional industry surveys.
MethodologyEach city's costs are derived from national averages adjusted by city-specific cost-of-living indices. Category-specific sensitivity factors account for varying price elasticity across topic areas.
ConfidenceMEDIUMModel-derived estimates, not direct price surveys

Limitations: This comparison uses modeled data based on cost-of-living indices. Actual costs may vary based on neighborhood, timing, provider, and individual circumstances. Salary data reflects median full-time employment; contract and freelance rates differ. Last updated: March 2026.

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