Darby, PA vs King of Prussia, PA

The cost of living difference between Darby, PA and King of Prussia, PA is dramatic. Darby is 34.2% cheaper than King of Prussia, a gap that translates to thousands of dollars per year in household expenses. Darby has a cost index of 85 while King of Prussia sits at 129, 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 Darby is $1,337/month compared to $1,995/month in King of Prussia — a 33% difference. Home values follow the same pattern: Darby is more affordable at $101,900 median vs $396,500.

Median household income in Darby is $45,128 compared to $111,600 in King of Prussia (-59.6%). While King of Prussia is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Darby spend roughly 35.6% of their income on rent, more than the 21.5% in King of Prussia. The King of Prussia ratio exceeds the commonly recommended 30% threshold, which can put pressure on household budgets.