Is St. Louis, MO cheaper than Kennewick, WA?

Based on cost of living data, St. Louis, MO is 7.9% cheaper than Kennewick, WA. This translates to saving $592 per month.

What salary do I need in St. Louis, MO to live like I do in Kennewick, WA?

If you earn $150,000 in Kennewick, WA, you'd need approximately $142,897.098 in St. Louis, MO to maintain the same standard of living.

How does housing cost compare between Kennewick, WA and St. Louis, MO?

Housing in St. Louis, MO is 9.6% cheaper than in Kennewick, WA. For a two-bedroom apartment, rent is $1,160/month in St. Louis, MO compared to $1,348/month in Kennewick, WA.

How much can I save per month by moving from Kennewick, WA to St. Louis, MO?

Moving from Kennewick, WA to St. Louis, MO could save you approximately $592 per month, or $7103 per year, based on a $150,000 salary.

Kennewick, WA vs St. Louis, MO: Cost of Living Comparison 2026

MoveNumbers

Tap to swap

Cost of Living Comparison 2026

📍 Kennewick, WA — ZIP-level rent data · COL adjusted from Spokane, WA area

Current salary in Kennewick, WA

Numbers update automatically as you type

You'd save $592/month moving to St. Louis, MO

$150.0K in your current city equals $142.9K in St. Louis, MO

Rent data from HUD ZIP-level estimates · COL index from area

Overall Cost

↓ 7.9%

Less expensive

Monthly Impact

$592

Savings

Annual Impact

$7.1K

Per year

Based on monthly living costs (rent, groceries, utilities, transport, healthcare). Home purchase prices shown separately below.

Kennewick, WA

Population:85K

Cost Index:100

Median Home:$392K

St. Louis, MO

Population:302K

Cost Index:92

Median Home:$145K

Kennewick, WA

The Evergreen State

85K

Population

State Tax

No Income Tax

Located in Washington, this city has a population of 85K residents.

💡 Advantage: Washington has no state income tax!

St. Louis, MO

The Show-Me State

302K

Population

State Tax

Yes

Located in Missouri, this city has a population of 302K residents.

Cost Breakdown by Category

Annual spending: Kennewick, WA vs St. Louis, MO

Category	Kennewick, WA	St. Louis, MO	Difference	Change
🚗Transportation	$1,888/mo	$1,216/mo	↓ $672less	35.6%
🏥Healthcare	$822/mo	$527/mo	↓ $295less	35.9%
🏠Housing	$2,070/mo	$1,871/mo	↓ $199less	9.6%
🛒Groceries	$1,076/mo	$949/mo	↓ $127less	11.8%
📦Other	$1,531/mo	$1,607/mo	↑ $75.80more	5.0%
⚡All Utilities	$479/mo	$535/mo	↑ $56.02more	11.7%

🚗Transportation

↓ 35.6%

Kennewick, WA

$1,888

St. Louis, MO

$1,216

Difference

$672

less

🏥Healthcare

↓ 35.9%

Kennewick, WA

$822

St. Louis, MO

$527

Difference

$295

less

🏠Housing

↓ 9.6%

Kennewick, WA

$2,070

St. Louis, MO

$1,871

Difference

$199

less

🛒Groceries

↓ 11.8%

Kennewick, WA

$1,076

St. Louis, MO

$949

Difference

$127

less

📦Other

↑ 5.0%

Kennewick, WA

$1,531

St. Louis, MO

$1,607

Difference

$75.80

⚡All Utilities

↑ 11.7%

Kennewick, WA

$479

St. Louis, MO

$535

Difference

$56.02

🏛️ Local Income Taxes

St. Louis, MO: St. Louis Earnings Tax$1,500/yr (1.0%)

Kennewick, WA has no local income tax.

Local taxes are in addition to state income tax. Not all cities levy local income taxes.

🏠Rent Comparison

Studio

From$980

To$910

↓ $70.00

1 Bed

From$1,111

To$950

↓ $161

2 Bed

From$1,348

To$1,160

↓ $188

3 Bed

From$1,817

To$1,490

↓ $327

Kennewick, WAZIP-level data

1BR range: $1,240–$1,390/mo

St. Louis, MOZIP-level data

1BR range: $800–$1,480/mo

💡 Note: Rent prices are based on HUD Fair Market Rent data and represent median costs. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$7,866

Monthly in Kennewick, WA

$6,705

Monthly in St. Louis, MO

$1,161

Difference

Home Values

Kennewick

St. Louis

$392K

Median Value

$145K

YoY Change

↓ -0.8%

↑ +28.3%

5-Year Change

↑ +10.9%

$362K - $423K

Price Range

$38K - $302K

Homes in St. Louis are 63% less expensive than Kennewick

Calculate payment - Kennewick Calculate payment - St. Louis

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

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings

↓ $7.9K

More taxes

Monthly Difference

$661

Less take-home

Effective Rate Diff

5.3%

Rate difference

Kennewick, WA

Federal Income Tax

Effective: 18.9%

$25.5K

Washington State Tax

No state income tax

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 24.7%

$37.0K

Take-Home Pay

$9,416/month

$113.0K

St. Louis, MO

Federal Income Tax

Effective: 18.9%

$25.5K

Missouri State Tax

Effective: 5.3%

$7.9K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 30.0%

$44.9K

Take-Home Pay

$8,755/month

$105.1K

Additional Tax Information

Kennewick, WA Tax Rates

Sales Tax:9.2%

Property Tax:0.9%

St. Louis, MO Tax Rates

Sales Tax:8.2%

Property Tax:1.0%

💡 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.