State comparison · 2025
Epidemiologists salary: Illinois vs Massachusetts
Epidemiologists in Massachusetts earn a median of $115,890. In Illinois, $102,720. After cost-of-living, the gap is 6.2% — not 11.4%.
Nominal pay gap
-11.4%
Illinois vs Massachusetts
COL-adjusted gap
-6.2%
After BEA Regional Price Parities
Illinois
Epidemiologists
- Median
- $102,720
- p25
- $77,580
- p75
- $106,230
- p10
- $65,570
- p90
- $138,800
- COL index (BEA RPP)100 = US average
- 100.0
- Hiring velocity (180d)
- -29%
Massachusetts
Epidemiologists
- Median
- $115,890
- p25
- $93,870
- p75
- $154,840
- p10
- $81,380
- p90
- $212,890
- COL index (BEA RPP)100 = US average
- 105.8
- Hiring velocity (180d)
- -13%
BLS Occupational Employment and Wage Statistics, May 2025. Cost-of-living adjustment from BEA Regional Price Parities (overall index). Hiring velocity from DOL OFLC public disclosure data, recent 180 days vs prior. See methodology.