Environmental Scientist Salary in Illinois
The median environmental scientist salary in Illinois is $72,704 per year, which is 5% below the national median of $76,530.
Environmental Scientist Salary Overview in Illinois (2026)
Illinois ranks #24 out of 50 states for environmental scientist compensation. Illinois falls in the middle of the pack for environmental scientist pay, offering salaries near the national average. At $72,704 per year, environmental scientists in Illinois earn $3,826 less than the national median of $76,530.
Illinois's cost of living is near the national average at 95%, meaning environmental scientist salaries here translate closely to their face value in purchasing power.
The salary spread in Illinois is significant: environmental scientists at the 10th percentile earn $45,600, while those at the 90th percentile bring home $119,700 — a $74,100 gap that reflects differences in experience, specialization, employer type, and metro area. The highest-paying city in Illinois for this role is Naperville, where the median reaches $82,652.
Nationally, environmental scientist employment is projected to grow 6% over the next decade (faster than average). This steady growth indicates stable demand for environmental scientists across the country.
Environmental Scientist Salary in Illinois by Experience
In Illinois, an entry-level environmental scientist earns around $47,500, while experienced professionals earn up to $114,000 per year. The cost of living index in Illinois is 95% of the national average.
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See Investment Options →Salary Percentiles in Illinois
| Percentile | IL Salary |
|---|---|
| 10th Percentile | $45,600 |
| 25th Percentile | $56,050 |
| Median (50th) | $72,704 |
| 75th Percentile | $94,050 |
| 90th Percentile | $119,700 |
Environmental Scientist Salary by City in Illinois
The largest employment areas for environmental scientists in Illinois include Chicago, Aurora, Naperville, and Rockford. Salaries vary by city based on local cost of living and demand.
How to Become a Environmental Scientist in Illinois
Education
Most environmental scientist positions require a bachelor's degree. Illinois has several accredited institutions offering relevant programs.
Key Skills
Job Outlook in Illinois
Nationally, environmental scientist employment is projected to grow 6% over the next decade (faster than average). Illinois's demand may vary based on local industry trends.
Negotiate Your Way to Senior Pay
Data shows Environmental Scientists who negotiate earn 7–15% more. A single negotiation could add $41,296 over your career trajectory.
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