Monthly estimate = 1BR rent + electricity + gas
A one-person monthly baseline (1BR rent plus typical utilities) runs $970 in Rapid City, SD versus $1,030 in Sioux Falls, SD. Overall, Rapid City, SD is roughly 6% cheaper to live in day-to-day than Sioux Falls, SD, driven mainly by rent.
Median household income is $65,712 in Rapid City, SD and $74,714 in Sioux Falls, SD — about 12% higher in Sioux Falls, SD. Both cities are in South Dakota, so state taxes are identical: no state income tax and a 4.2% state sales tax.
Rent
Buying a Home
Income
People & Lifestyle
Crime (per 100k/yr)
FBI Crime Data Explorer. Offenses per 100,000 residents per year; agency reporting practices vary, so this is approximate.
Climate
Gas
Area: Midwest (PADD 2) vs Midwest (PADD 2).
Utilities
Residential, state-level averages (EIA). MCF = 1,000 cubic feet.
Groceries
Average prices — Midwest vs Midwest (BLS). Regional where available, otherwise U.S. average.
State Taxes
Rapid City vs Sioux Falls — FAQ
- Is it cheaper to live in Rapid City or Sioux Falls?
- Rapid City, SD is cheaper. Its monthly baseline of $970 (1BR rent + utilities) runs about 6% below Sioux Falls, SD's $1,030, mainly because of rent.
- How much more do you need to earn to live in Rapid City than in Sioux Falls?
- To keep rent near the recommended 30% of gross income, you'd want to earn roughly $32,000 a year in Rapid City versus $35,000 in Sioux Falls.
- Which has lower taxes, Rapid City or Sioux Falls?
- Neither — both are in South Dakota, so they share the same state tax rates: no state income tax and a 4.2% state sales tax.
Sources: US Census Bureau, ACS 5-Year (rent, income, home value, demographics); NOAA Climate Normals 1981–2010 (climate); EIA weekly retail (gas); Tax Foundation 2026 (state taxes).