Mercer Island, WA vs Olympia, WA

The cost of living difference between Mercer Island, WA and Olympia, WA is dramatic. Olympia is 122.9% cheaper than Mercer Island, a gap that translates to thousands of dollars per year in household expenses. Mercer Island has a cost index of 269 while Olympia sits at 121, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.

On the housing front, median rent in Mercer Island is $2,464/month compared to $1,509/month in Olympia — a 63% difference. Home values follow the same pattern: Olympia is more affordable at $457,900 median vs $1,884,200.

Median household income in Mercer Island is $202,359 compared to $76,930 in Olympia (+163%). While Mercer Island is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Mercer Island spend roughly 14.6% of their income on rent, less than the 23.5% in Olympia.

Climate-wise, Mercer Island is notably warmer with an average of 53.8°F compared to 50.5°F in Olympia. Olympia receives more rainfall at 50.6" per year compared to 36.5" in Mercer Island.