How Much Do Hydrologists Make in Illinois?
Median wage from BLS May 2025 — and the after-tax number the salary sites skip. Tax year 2026.
Quick answer
According to payandtaxes.com's analysis of BLS May 2025 data and 2026 tax law, the median Hydrologists in Illinois earns $83,720 per year and takes home $63,728 ($5,311/month) — a keep-rate of 76.1%, with 100 employed in the state.
Free. No signup. Single filer, standard deduction — full model.
| Gross pay | $6,976.67 |
| Federal income tax | $799.02 |
| Social Security | $432.55 |
| Medicare | $101.16 |
| Illinois state income tax | $333.28 |
| You keep | $5,310.65 |
How much do Hydrologists make in Illinois?
The median Hydrologists in Illinois earns $83,720 per year (BLS May 2025), about $40.25 per hour.
What is that after taxes?
$83,720 gross in Illinois keeps $63,728 after federal income tax ($9,588), FICA ($6,405) and state income tax ($3,999) — $5,311 per month, a 76.1% keep-rate.
How does Illinois compare to the national median for Hydrologists?
The Illinois median is $12,880 below the national median of $96,600.
Which state pays Hydrologists the most?
Maryland has the highest median gross for Hydrologists at $143,010 — but compare take-home, not gross: state taxes change the order.
Hydrologists salary in every state · Illinois paycheck calculator · Illinois minimum wage