Mercer Island, WA vs Yelm, WA

The cost of living difference between Mercer Island, WA and Yelm, WA is dramatic. Yelm is 134.5% 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 Yelm sits at 115, 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 $1,363/month in Yelm — a 81% difference. Home values follow the same pattern: Yelm is more affordable at $439,100 median vs $1,884,200.

Median household income in Mercer Island is $202,359 compared to $88,279 in Yelm (+129.2%). The higher salaries in Mercer Island partially offset the cost difference, but don't fully close the gap. Looking at affordability, residents of Mercer Island spend roughly 14.6% of their income on rent, less than the 18.5% in Yelm.

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