Idaho Falls vs Rapid City for Families (2026)
Scroll down for childcare estimates, home price-to-income ratios, and FAQ.
Full family cost breakdown
| Metric | Idaho Falls Idaho | Rapid City South Dakota |
|---|---|---|
| Studio rent / month | $900Better | $950 |
| 2BR rent / month | $1,450Better | $1,600 |
| Median home price | $310K | $285KBetter |
| Median household income | $56K | $58KBetter |
| Est. childcare / month | $1,131Better | $1,144 |
| State income tax | 5.8% | NoneBetter |
| Sales tax (combined) | 6%Better | 6.4% |
| Monthly utilities | $142Better | $148 |
| Groceries index (US = 100) | 96Better | 96 |
Frequently asked questions
Which city is better for raising a family — Idaho Falls or Rapid City?
Based on housing costs, income, taxes, and overall affordability, Rapid City scores better for families. 2-bedroom rent is $1,450/mo in Idaho Falls vs $1,600/mo. Idaho Falls is approximately 1% cheaper overall. That said, both cities have strong family communities — the right choice depends on your career, lifestyle, and proximity to family.
What is the average 2-bedroom rent in Idaho Falls vs Rapid City?
As of Q1 2026, median 2BR rent is $1,450/month in Idaho Falls and $1,600/month in Rapid City. Idaho Falls is 9% cheaper for a family-sized apartment.
Can a family afford to buy a home in Idaho Falls or Rapid City?
The price-to-income ratio in Idaho Falls is 5.5× ($310K median home, $56K median income). In Rapid City it's 4.9× ($285K home, $58K income). A ratio below 3× is generally considered affordable — Rapid City is more achievable for first-time family homebuyers.
How much does childcare cost in Idaho Falls vs Rapid City?
Estimated infant/toddler childcare runs approximately $1,131/month in Idaho Falls and $1,144/month in Rapid City, based on national averages scaled by each city's cost-of-living index. Annual childcare cost difference: ~$156/year.
Which city has lower taxes for families?
Idaho Falls has a 5.8% state income tax rate vs Rapid City has no state income tax. For a dual-income family earning $120K combined, that difference is roughly $580/month in take-home pay.
$100K in Idaho Falls has the same purchasing power as $101K in Rapid City
Childcare estimates based on national avg scaled by COL index · Data: Zillow, BLS, Numbeo, Tax Foundation · Q1 2026