Big Sky, MT vs Sidney, MT

The cost of living difference between Big Sky, MT and Sidney, MT is dramatic. Sidney is 98.8% cheaper than Big Sky, a gap that translates to thousands of dollars per year in household expenses. Big Sky has a cost index of 159 while Sidney sits at 80, 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 Big Sky is $1,712/month compared to $890/month in Sidney — a 92% difference. Home values follow the same pattern: Sidney is more affordable at $249,100 median vs $884,700.

Median household income in Big Sky is $103,625 compared to $62,992 in Sidney (+64.5%). The higher salaries in Big Sky partially offset the cost difference, but don't fully close the gap. Looking at affordability, residents of Big Sky spend roughly 19.8% of their income on rent, more than the 17% in Sidney.