Overall
- Rapid City
- 89.2
Diff -0.1 RPP
Rapid City vs Davenport-Moline-Rock Island
Cost of living comparison based on BEA Regional Price Parities. Davenport-Moline-Rock Island is 0.1% less expensive than Rapid City.
0.1% less expensive
Davenport-Moline-Rock Island, IA-IL is 0.1% less expensive than Rapid City, SD on BEA Regional Price Parities (overall RPP 89.1 vs 89.2). A $100,000 salary in Rapid City buys about the same as $99,909 in Davenport-Moline-Rock Island; the largest component gap is services.
- Overall RPP 89.2 (Rapid City) vs 89.1 (Davenport-Moline-Rock Island)
- $100k in Rapid City ≈ $99,909 purchasing power in Davenport-Moline-Rock Island
- Services drives the gap (+10.9 RPP points)
RPP parity plate
Pair SD:IA 89.2→89.1
PHOTO-FINISH · CROSS-STATE · SPLIT-BUDGET · BOTH-BELOW · PP-PAR
- PHOTO-FINISH Photo finish
- CROSS-STATE SD × IA
- SPLIT-BUDGET Split budget
- BOTH-BELOW Both below 100
- PP-PAR PP near-par
Instrument codes from this pair's BEA Regional Price Parities (overall · goods · services · rents · national benchmark 100 · purchasing-power conversion), not a ranking or recommendation.
Rapid City
89.2
Cost Index
Davenport-Moline-Rock Island
89.1
Cost Index
What This Comparison Actually Tells You
Rapid City, SD and Davenport-Moline-Rock Island, IA-IL are a photo finish on overall price level, only 0.1 RPP points apart. A salary conversion is therefore a fine adjustment, not evidence of a fundamentally different cost regime.
Services creates the largest separation: Davenport-Moline-Rock Island is 10.9 points higher. But services move against the overall direction, so this is a split budget rather than a clean across-the-board winner.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
Both metros remain below the U.S. benchmark of 100. This comparison chooses between two below-average price levels; “more expensive” here does not mean nationally expensive.
For a service-heavy household, test childcare, health, and other locally supplied costs before relying on rent alone. The BEA ratio converts $100,000 in Rapid City to $99,909 in Davenport-Moline-Rock Island, but it is not a personal spending weight.
Category Breakdown
Goods
- Rapid City
- 95.5
Diff -1.3 RPP
Services
- Rapid City
- 79.1
Diff +10.9 RPP
Rents
- Rapid City
- 72.6
Diff -4.2 RPP
| Category | Rapid City | Davenport-Moline-Rock Island | Difference |
|---|---|---|---|
| Overall | 89.2 | 89.1 | -0.1 |
| Goods | 95.5 | 94.2 | -1.3 |
| Services | 79.1 | 89.9 | +10.9 |
| Rents | 72.6 | 68.3 | -4.2 |
Visual Comparison
Overall
Rapid City 89.2
Davenport-Moline-Rock Island 89.1
Goods
Rapid City 95.5
Davenport-Moline-Rock Island 94.2
Services
Rapid City 79.1
Davenport-Moline-Rock Island 89.9
Rents
Rapid City 72.6
Davenport-Moline-Rock Island 68.3
Vertical line = national average (100)
Salary Equivalents
What a salary in Rapid City would need to be in Davenport-Moline-Rock Island for the same purchasing power:
| In Rapid City | In Davenport-Moline-Rock Island | Difference |
|---|---|---|
| $50,000 | $49,955 | $-45 |
| $75,000 | $74,932 | $-68 |
| $100,000 | $99,909 | $-91 |
| $150,000 | $149,864 | $-136 |
$ in Rapid City = in Davenport-Moline-Rock Island
Same BEA Regional Price Parity ratio as the table above (89.2 → 89.1), computed live from your number, nothing is sent anywhere.
Frequently Asked Questions
Is Davenport-Moline-Rock Island more expensive than Rapid City?
Davenport-Moline-Rock Island is 0.1% less expensive than Rapid City. The overall cost index is 89.1 vs 89.2 (national average = 100).
What salary in Davenport-Moline-Rock Island equals $100K in Rapid City?
A $100,000 salary in Rapid City has the same purchasing power as $99,909 in Davenport-Moline-Rock Island. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Rapid City and Davenport-Moline-Rock Island?
Rents in Rapid City are indexed at 72.6 while Davenport-Moline-Rock Island is at 68.3 (national average = 100). Rapid City has higher rents.
Data sources
- BEA Regional Price Parities (RPP), the cost-of-living indices shown on this page
- U.S. Census Bureau, American Community Survey (ACS), gross-rent observations behind the rents component
- BLS Consumer Price Index (CPI), goods and services price relatives
- BLS Occupational Employment and Wage Statistics (OEWS), labor-driven services component
- HUD Fair Market Rents (FMR), 40th-percentile rent cross-reference
Every figure on PlainCost is rendered directly from BEA Regional Price Parity source data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, our changelog, or report a data error. Data current as of 2026-08-11. Rankings measure the published cost-of-living index only; we don't recommend where to live or rate any metro's quality of life.