F
164%
Overall NAT. AVG.
10%
Groceries NAT. AVG.
511%
Housing NAT. AVG.
Date & Last Updated: These cost of living estimates reflect 2026 modeled data using U.S. Census housing inputs and AI-assisted city-level pricing models.
The cost of living index is based on a national average of 100. For example, if the cost of living score is 90, then the estimated cost of living is 10% lower than the national average. If the score is 110, then the estimated cost of living is 10% higher than average. The overall index is calculated using weighted estimates across major everyday expense categories, including housing (30%), groceries (16%), transportation (12%), healthcare (10%), utilities (8%), lifestyle and entertainment (8%), household expenses (8%), and education and childcare (8%). All values are AI-assisted city-level estimates designed for directional comparisons.
Index Mercer Island Washington National
Cost of living264119100
Groceries110107100
Health care111109100
Housing611138100
Transportation119112100
Utilities116110100
Lifestyle & Entertainment119112100
Household Items111107100
Education & Childcare130117100
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An Overview of Cost of Living in Mercer Island, WA

Understanding the cost of living in Mercer Island can help future residents assess whether their current financial situation aligns with the expenses they will encounter. It enables them to plan for potential changes in their budget and lifestyle. The Mercer Island cost of living index is 264, which is 164% higher than the national average. The cost of living index is calculated by taking into account multiple categories, which encompass both the cost of everyday expenditures and larger expenses as well.

If you value affordability in your search for a new place to live, Mercer Island may not be the most suitable option, as it stands out as one of the priciest areas in the entire United States. Only a small fraction of regions have a cost of living that is more than 20% higher than the national average, and regrettably, Mercer Island falls into this category, which may not align with your desire for an affordable place to call home.

Housing costs significantly influence the Mercer Island cost of living index, typically accounting for a substantial portion of one's post-tax income. Regrettably, within this particular region, expenses related to both residential ownership and renting exceeded those observed in an average city by 511.5%. This entails elements such as housing and rental prices, mortgage interest rates and insurance costs.

Household expenses make up 8% of the total cost of living index score and cover the everyday essentials needed to keep your home running smoothly. These items may include cleaning supplies, laundry detergent, toiletries, clothing basics, and kitchen essentials. In Mercer Island, you can expect to pay 10.5% more than average for these everyday necessities, making it a more expensive place to live.

The substantial and relentless rise in grocery prices definitely warrants some attention. Over the past two years, grocery expenses have escalated by more than 10%. Having said that, the situation in Mercer Island is even less favorable, with grocery prices here being 10.1% higher than the national average.

What Do Locals Say About the Cost of Living in Mercer Island?

The real experts on a city are its residents. That's why we reached out to 10 locals to get their views on the cost of living in Mercer Island. We surveyed the residents and asked them if they felt like prices were affordable or out of reach. The results were as follows. 10% found it budget-friendly with decreasing prices, while 90% said it's simply not affordable as prices have continued to rise.

Is Mercer Island Affordable?

Is Mercer Island an affordable place to live? That's a valid question to ask when you're thinking about moving to a new city. After all, how much it costs to live somewhere can be a huge factor in your decision. Affordability can be broken down into 3 common categories. The cost of living index (we talked about it earlier), housing expenses and income levels all play a big role in figuring out if a place is affordable. For instance, in Mercer Island, the median home price is 678.4% higher than what most folks pay across the country, and monthly rent prices are 122% higher than the usual rates. Income levels in Mercer Island come in at $227,166, which is 179.3% higher than the national average.

What Factors can Influence the Cost of Living in Mercer Island?

Taxes: Cities that impose higher taxes, including sales and income taxes, can contribute to an escalated cost of living. The added expense of taxes on everyday goods like clothing and food naturally results in higher overall costs. Similarly, a higher income tax rate can further elevate the cost of living. In Mercer Island, the general sales tax rate starts at 6.5%, and income tax rates begin at 0%.

Healthcare: Healthcare expenses and insurance premiums can vary significantly depending on the specific city or state. Factors such as accessibility to healthcare facilities, out-of-pocket expenses for doctor's visits, dental care expenses, prescription costs and specialized medical care fees can all influence the overall cost of living. In Mercer Island, healthcare costs are 11.4% higher than the national average.

Groceries: Grocery expenditures have undergone notable escalation over the last 2-3 years. In some markets, the cost of food products has surged by more than 20%, while others have experienced only modest increments. These fluctuations in food costs can have a significant impact on the overall cost of living in any region. In Mercer Island, the groceries index registers 10.1% higher than the national average.

Where is the Data From?

The cost of living estimates displayed for Mercer Island are modeled using a U.S. average baseline of 100, helping provide a useful comparison of local living expenses. Housing calculations include U.S. Census home price and rental data, while all other values are AI-assisted estimates based on regional cost patterns, climate, transportation, and everyday spending expectations. These values are intended for directional comparisons across cities.

Cost Of Living Quick Facts

  • The cost of living in Mercer Island is 123% higher than the Washington average
  • The cost of living in Mercer Island is 164% higher than the national average
  • Mercer Island housing is 511% higher than the national average
  • Washington general sales tax is 27% higher than the national average
  • Washington state income tax is 100% lower than the national average

Most Affordable Places to Live in and Around Mercer Island

See all the best places to live around Mercer Island

Compare Mercer Island, WA Cost of Living

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      Median Income & Debt-To-Income Ratio

      Median Income Per Year Per Month Max Budget (28% DTI) Max Budget (36% DTI)
      Owners$324,121$27,010$7,562$9,725
      Renters$123,934$10,328$2,892$3,718
      A good indicator of the general affordability of housing in Mercer Island, WA, is the percentage of monthly income that should be spent on housing expenses, otherwise known as the debt-to-income ratio (DTI). Generally speaking, no more than 28 percent of your total gross income should be spent on your housing expenses and not more than 36 percent of your gross income on total expenses, including debts. In Mercer Island, the median monthly income is $324,121 for those who own their own homes. Under the standard rule, that income level would allow for $7,562 to be budgeted for housing expenses each month, at the most. Renters, on the other hand, earn about $123,934, per the median income in the area. That would allow for renters to spend up to $2,892 on monthly rental expenses.

      Washington Sales Tax

      State General Sales Tax With Max Surtax
      Washington 6.5% 10.4%

      Washington Income Tax

      State Income Tax (Low) Income Tax (High)
      Washington 0% 0%

      Nearby cities with low cost of living

      City Population Cost of Living Index National Avg.
      Fairwood CDP (Spokane County), WA8,33111313.4%
      Tukwila, WA20,71012625.7%
      Manchester, WA6,24912828.1%
      Indianola, WA3,67812928.9%
      SeaTac, WA30,18612929.0%
      Mercer Island, WA26,374264164.5%

      Cities with similar population

      City Population Cost of Living Index National Avg.
      Lockport, IL26,3861109.9%
      Keystone, FL26,35913636.3%
      Fairland, MD26,40013333.3%
      Socastee, SC26,401981.7%
      Reedley, CA26,41711716.9%
      Mercer Island, WA26,374264164.5%
      Date & Last Updated: These cost of living estimates reflect 2026 modeled data using U.S. Census housing inputs and AI-assisted city-level pricing models.