Humboldt, IA vs Sullivan, IL: Cost of Living

Which city costs less?

Sullivan, IL has a modeled overall cost index 3.0% higher than Humboldt, IA.

Humboldt, IA · modeled 2BR rent
$920 / month
Sullivan, IL · modeled 2BR rent
$980 / month

These are saved estimates, not current rental listings. Some cities use adjusted regional data. Your household budget can differ from the overall index. Sources and assumptions

Adjust your income and compare the budget ↓
Tap to swap

Cost of Living Comparison 2026

Compare Humboldt, IA and Sullivan, IL using saved regional data and explicit budgeting assumptions. Rent estimates are not live listings. Change the salary below, then check the source notes before applying a result to your household.

Saved regional estimates · Sources and assumptions

$
Numbers update automatically as you type

Estimated extra cost: $104/month in Sullivan, IL

$150,000 in your current city has a modeled equivalent of $151,247 in Sullivan, IL

Regional cost estimates: Humboldt, IA uses Des Moines, IA. Sullivan, IL uses St. Louis, MO. Available city ZIP rent estimates are shown separately.
Overall Cost
↑ 3.0%
More expensive
Monthly Impact
$104
Extra cost
Annual Impact
$1.2K
Per year

Assumes 60% of current gross income goes to living costs. The headline uses the category budget below; taxes, moving costs and savings goals are excluded.

Humboldt, IA

Population:5K
Cost Index:
79.4
100 = national average
Typical Home:$181K

Sullivan, IL

Population:4K
Cost Index:
81.8
100 = national average
Typical Home:$183K

Planning the move to Sullivan?

Organize packing, address changes, and moving-day tasks with a free checklist. Your progress saves in this browser. No account needed.

Plan my move with the free checklist

Humboldt, IA

The Hawkeye State

5K
Population
State Tax
Yes

Located in Iowa, this city has a population of 5K residents.

Sullivan, IL

The Prairie State

4K
Population
State Tax
Yes

Located in Illinois, this city has a population of 4K residents.

Cost Breakdown by Category

Estimated monthly spending: Humboldt, IA vs Sullivan, IL

Assumes 60% of your current gross income is spent on these categories. The headline and totals use this same budget. Rent estimates below are separate reference data. Rounded amounts may differ by $1.

Healthcare
↓ 20.2%
Humboldt, IA
$787
Sullivan, IL
$628
Difference
$159
less
Other
↑ 6.5%
Humboldt, IA
$1,743
Sullivan, IL
$1,857
Difference
$114
more
All Utilities
↑ 17.6%
Humboldt, IA
$543
Sullivan, IL
$638
Difference
$95.57
more
Housing
↓ 4.1%
Humboldt, IA
$2,029
Sullivan, IL
$1,946
Difference
$83.76
less
Groceries
↑ 7.7%
Humboldt, IA
$1,050
Sullivan, IL
$1,131
Difference
$81.35
more
Transportation
↑ 4.2%
Humboldt, IA
$1,348
Sullivan, IL
$1,405
Difference
$56.40
more

🏠Rent Comparison

Studio
From$680
To$680
→ $0
1 Bed
From$800
To$750
↓ $50.00
2 Bed
From$920
To$980
↑ $60.00
3 Bed
From$1,280
To$1,360
↑ $80.00
Humboldt, IAZIP-level data

1BR range: $800–$800/mo

Sullivan, ILZIP-level data

1BR range: $750–$750/mo

💡 Note: HUD Fair Market Rents estimate 40th-percentile gross rents, including most tenant-paid utilities. City ZIP summaries are medians of those estimates, not market median rents. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$7,500
Monthly in Humboldt, IA
$7,604
Monthly in Sullivan, IL
$104
Difference

Home Values

Humboldt
Sullivan
$181K
Median Value
$183K
↑ +8.3%
YoY Change
↑ +8.4%
↑ +28.8%
5-Year Change
↑ +39.6%

Homes in Sullivan are 1% more expensive than Humboldt

Calculate payment - HumboldtCalculate payment - Sullivan

Source: Zillow Home Value Index (ZHVI), January 2026

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings
↑ $3.3K
Per year
Monthly Difference
$273
More take-home
Effective Rate Diff
2.2%
Rate difference

Humboldt, IA

Federal Income Tax
Effective: 18.9%
$25.5K
Iowa State Tax
Effective: 7.1%
$10.7K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 31.8%
$47.7K
Take-Home Pay
$8,524/month
$102.3K

Sullivan, IL

Federal Income Tax
Effective: 18.9%
$25.5K
Illinois State Tax
Effective: 5.0%
$7.4K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 29.6%
$44.4K
Take-Home Pay
$8,797/month
$105.6K

Additional Tax Information

Humboldt, IA Tax Rates

Sales Tax:7.4%
Property Tax:1.5%

Sullivan, IL Tax Rates

Sales Tax:8.8%
Property Tax:2.2%

💡 Note: Tax calculations are estimates based on 2024/2025 tax brackets for single filers with standard deduction. Actual taxes may vary based on filing status, deductions, credits, and local variations.

Environment

Humboldt
Sullivan
45 Good
Air Quality
54 Moderate
67.5%
Good Air Days
38%
92 Moderate
Climate Risk
99 High
🌡☀🌪
Top Hazards
🌊🌡🫨
▲+3.4°F
2050 Outlook
▲+3.0°F
25 days
Heat Days >95°F
39 days
▲+3.4°F
2050 Outlook
▲+3.0°F
25 days
Heat Days >95°F
39 days

Before moving from Humboldt, IA to Sullivan, IL

Use this comparison to shortlist a move, then check the costs that depend on your household.

  1. Compare actual homes. Get current quotes in Sullivan, IL for the same bedroom count and included utilities as your home in Humboldt, IA. Add parking, deposits, insurance and any overlapping leases. The rent estimates above are a starting point, not available listings.
  2. Confirm your income. Check your expected pay with your employer, including any location adjustment. Use “Different salary at destination?” above to compare two incomes. The budget model excludes taxes and one-time moving costs; it is not a take-home-pay calculation.
  3. Price your daily routine. Check the commute from a specific address to work, school or childcare. Add household expenses missing from this model, such as childcare, debt payments and medical needs. Verify local services before signing a lease.
  4. Plan the transition. Get moving quotes and budget for travel, setup costs and time off. Open your Humboldt to Sullivan moving checklist to organize the tasks and timing.

Still choosing a destination? Explore cities similar to Sullivan, IL by cost, housing, population and region.

Frequently Asked Questions: Humboldt, IA vs Sullivan, IL

How do the cost estimates for Humboldt, IA and Sullivan, IL compare?

Sullivan, IL has a modeled overall cost index 3.0% higher than Humboldt, IA. This is a broad model comparison, not a survey of today's prices or a forecast of your household spending. Some cities use adjusted regional fallback data.

What does the equivalent salary mean?

At a $150,000 salary in Humboldt, IA, the model estimates $151,247 in Sullivan, IL. It allocates 60% of gross income to the origin city’s category budget and applies each destination category’s relative cost. The equivalent salary adds the total category difference to your income. The monthly difference is the same category difference divided by 12; it is not take-home pay or guaranteed savings. Household size, childcare and your actual lease are not inputs to this calculation.

What rent estimates are available for Humboldt, IA and Sullivan, IL?

The modeled two-bedroom rents are $920/month in Humboldt, IA and $980/month in Sullivan, IL. Where available, the source is a city median of HUD FY2026 ZIP-level estimates; otherwise a saved metro table is used. City adjustments may also apply. These are not asking rents or available listings. Compare actual properties with the same bedroom count and included utilities.

How should I use this comparison before moving?

Use it to shortlist locations, then replace modeled costs with a current housing quote, employer-confirmed income, commute costs, insurance and your household's other expenses. Add one-time moving costs separately. Source years differ and the saved datasets are not a live price feed. Read the methodology for the formulas and fallback rules.

💰 See how taxes change too — compare take-home pay between Iowa and Illinois on TaxTakeHome.com

Similar cost to Sullivan, IL

Other cities in a similar price range

San Antonio, TXIndianapolis, INColumbus, OH

Want to compare different cities?

New Comparison