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Data Scientist Salary in Illinois (2026)
$51.23 per hour · take-home ≈ $78,520/year ($6,543/month) for a single filer
Illinois ranks 22nd of 50 states for Data Scientist pay, with a median about 11% below the national average. Of the 10,520 Data Scientist jobs BLS counts in Illinois, the typical worker earns $106,560 a year — though pay ranges from $68,810 for newcomers to $168,880 at the top.
Data Scientist pay range in Illinois
| Percentile | Annual wage | Meaning |
| 10th percentile (entry) | $68,810 | Lowest-paid 10% earn less than this |
| 25th percentile | $84,610 | A quarter earn less |
| Median (50th) | $106,560 | Half earn more, half earn less |
| 75th percentile | $137,290 | Top quarter starts here |
| 90th percentile (top) | $168,880 | Highest-paid 10% earn more than this |
BLS reports 10,520 Data Scientist jobs in Illinois (occupation code 15-2051, “Data Scientists”).
Gross vs. take-home in Illinois
A median Data Scientist salary of $106,560 doesn’t all reach your bank account. After federal income tax, Social Security, and Medicare, plus Illinois state income tax, a single filer keeps about $78,520 — an effective tax rate of 26.3%.
| Gross (median) | $106,560 |
| Federal income tax | −$14,613 |
| Social Security + Medicare | −$8,152 |
| Illinois state income tax | −$5,275 |
| Take-home (annual) | $78,520 |
| Take-home (monthly) | $6,543 |
Want your exact numbers — married, 401(k), different salary? Use the free Illinois paycheck calculator on PaycheckTally.
Frequently asked questions
- How much does a Data Scientist make in Illinois?
- The median Data Scientist salary in Illinois is $106,560 per year ($51.23 per hour) according to the latest BLS data. The middle 50% earn between $84,610 and $137,290.
- What is the take-home pay for a Data Scientist in Illinois?
- On the median salary of $106,560, a single filer in Illinois takes home about $78,520 per year ($6,543 per month) after federal tax, FICA, and state income tax — an effective tax rate of 26.3%.
- How many Data Scientist jobs are there in Illinois?
- BLS counts 10,520 Data Scientist jobs in Illinois in the latest survey (May 2025).
Top-paying states for Data Scientists
Other salaries in Illinois
Sources and methodology
Wage and employment figures: BLS OEWS May 2025 (state file, released April 2026) — the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics survey, the most authoritative public salary dataset. Take-home estimate: 2026 federal brackets, FICA, and verified Illinois state tax rules (single filer, standard deduction, no credits or local taxes). Estimates only — not financial advice.
- BLS OEWS — official occupational wage data.
- PaycheckTally — interactive 2026 take-home calculator for Illinois.