Cambridge vs Rapid City
Cost of Living Comparison · 2026
Cambridge
Rapid City
The Verdict
Rapid City is 81.6% less expensive than Cambridge overall. A household earning $75,000 in Cambridge would need approximately $41,292 in Rapid City to maintain the same standard of living.
Category-by-Category Breakdown
Index values · National average = 100 · Lower is more affordable
Salary Equivalence
A $75,000 salary in Cambridge has the same purchasing power as $41,292 in Rapid City.
Conversely, $75,000 in Rapid City equals $136,224 in Cambridge.
Living in Cambridge vs Rapid City
Housing Costs
Cambridge's housing index of 280 is higher Rapid City's 91, translating to median home prices of $890,000 vs $325,000. The $565,000 difference in home prices means roughly $36,720 per year in additional mortgage costs at current rates. Renters face a similar gap: $3,100/mo in Cambridge compared to $1,100/mo in Rapid City, a monthly difference of $2,000.
Grocery & Food Costs
Grocery expenses index at 110 in Cambridge and 102 in Rapid City. A household spending the national average of $475/month on groceries would pay approximately $523/month in Cambridge vs $485/month in Rapid City. Rapid City offers a meaningful advantage on everyday food costs, saving roughly $456/year.
Utility Expenses
Utility costs — electricity, gas, water, internet — index at 126 in Cambridge and 87 in Rapid City. Monthly utility bills average approximately $504 in Cambridge vs $348 in Rapid City. Climate differences between the two cities drive much of this gap, with heating and cooling costs varying substantially by region.
Healthcare
Healthcare costs index at 118 in Cambridge and 107 in Rapid City. This encompasses insurance premiums, doctor visit copays, dental care, and prescription costs. The 11-point gap reflects real differences in provider costs, insurance market competition, and regional healthcare infrastructure.
Income & Purchasing Power
Median household income is $103,154 in Cambridge and $70,900 in Rapid City. After adjusting for local costs, purchasing-power-equivalent incomes are approximately $57,952 and $72,347 respectively. Rapid City residents come out ahead in real purchasing power.
Relocation Considerations
Under the standard 28% rule, a median-income household can allocate $2,407/month to housing in Cambridge vs $1,654/month in Rapid City. In Cambridge, median rent of $3,100/mo exceeds this threshold, suggesting renters may feel stretched. In Rapid City, median rent of $1,100/mo remains manageable. The biggest category-level difference between these two cities is Housing, where the gap is 189 index points — focus your budget analysis there.
Frequently Asked Questions
Moving & Relocation Resources
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