Overall
Diff +6.1 RPP
Rockford vs Lancaster
Cost of living comparison based on BEA Regional Price Parities. Lancaster is 6.6% more expensive than Rockford.
6.6% more expensive
Lancaster, PA is 6.6% more expensive than Rockford, IL on BEA Regional Price Parities (overall RPP 98.3 vs 92.2). A $100,000 salary in Rockford buys about the same as $106,623 in Lancaster; the largest component gap is rents.
- Overall RPP 92.2 (Rockford) vs 98.3 (Lancaster)
- $100k in Rockford ≈ $106,623 purchasing power in Lancaster
- Rents drives the gap (+23.7 RPP points)
RPP parity plate
Pair IL:PA 92.2→98.3
TIER-NEAR · CROSS-STATE · RENT-LED · BOTH-BELOW · PP-SHIFT
- TIER-NEAR Near tier
- CROSS-STATE IL × PA
- RENT-LED Rent-led gap
- BOTH-BELOW Both below 100
- PP-SHIFT PP shift
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.
Salary Equivalents
What a salary in Rockford would need to be in Lancaster for the same purchasing power:
| In Rockford | In Lancaster | Difference |
|---|---|---|
| $50,000 | $53,311 | +$3,311 |
| $75,000 | $79,967 | +$4,967 |
| $100,000 | $106,623 | +$6,623 |
| $150,000 | $159,934 | +$9,934 |
$ in Rockford = in Lancaster
Same BEA Regional Price Parity ratio as the table above (92.2 → 98.3), computed live from your number, nothing is sent anywhere.
What This Comparison Actually Tells You
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.
Lancaster, PA is 6.6% more expensive than Rockford, IL, a meaningful but not extreme shift. The move decision turns on which budget category creates the 6.1-point overall gap.
Rents leads the difference, with Lancaster 23.7 points higher than Rockford. Goods, services, and rents all point in the same broad direction, making the headline comparison more transferable across household types.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
For a housing-sensitive move, validate the rent gap first: HUD Fair Market Rent and the actual unit size can overturn what the blended index implies. On the BEA ratio alone, $100,000 in Rockford corresponds to $106,623 in Lancaster.
Category Breakdown
Goods
Diff +7.0 RPP
Services
Diff +17.9 RPP
Rents
Diff +23.7 RPP
| Category | Rockford | Lancaster | Difference |
|---|---|---|---|
| Overall | 92.2 | 98.3 | +6.1 |
| Goods | 93.6 | 100.7 | +7.0 |
| Services | 89.4 | 107.3 | +17.9 |
| Rents | 70.1 | 93.8 | +23.7 |
Visual Comparison
Overall
Rockford 92.2
Lancaster 98.3
Goods
Rockford 93.6
Lancaster 100.7
Services
Rockford 89.4
Lancaster 107.3
Rents
Rockford 70.1
Lancaster 93.8
Vertical line = national average (100)
Rockford
92.2
Cost Index
Lancaster
98.3
Cost Index
Frequently Asked Questions
Is Lancaster more expensive than Rockford?
Lancaster is 6.6% more expensive than Rockford. The overall cost index is 98.3 vs 92.2 (national average = 100).
What salary in Lancaster equals $100K in Rockford?
A $100,000 salary in Rockford has the same purchasing power as $106,623 in Lancaster. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Rockford and Lancaster?
Rents in Rockford are indexed at 70.1 while Lancaster is at 93.8 (national average = 100). Lancaster 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.