Data Scientist Salary in Illinois (2026)

The Chicago prop trading scene is the most distinctive feature of the local DS market. Citadel (technically headquartered in Miami now but with major Chicago operations), DRW, Jump Trading, Belvedere, Akuna Capital, and several smaller firms compete aggressively for quantitative researcher and ML engineer talent. Comp at the top of this market matches NYC quant comp dollar-for-dollar, but the cost of living differential means the post-tax, post-housing savings rate is materially better.

The corporate DS market is the broader and more stable base. Boeing, McDonald's, Walgreens, Caterpillar, Abbott, United Airlines, Allstate, and dozens of other Fortune 500s headquartered in or near Chicago all maintain substantial data science teams. Hours are predictable, compensation is solid, and the work spans genuinely diverse problem areas (supply chain, pricing, customer analytics, predictive maintenance).

Illinois's flat 4.95% income tax is meaningfully lower than NYC's combined 14.8% and California's progressive 13.3% top rate. A senior DS earning $250,000 pays roughly $24,000 less in state tax annually than the same role in NYC. Combined with lower housing costs, the real take-home difference is substantial — Chicago DS professionals often save 30–45% more annually than NYC peers at equivalent gross comp.

The healthcare DS market is genuinely strong. Northwestern Medicine, Rush University Medical Center, and the University of Chicago all support healthcare AI and clinical data research. Companies like Tempus AI (founded in Chicago) and a growing health-tech cluster around the Illinois Medical District provide industry-side opportunities.

Chicago DS culture is distinct: less prestige-obsessed than NYC, less startup-influenced than the Bay Area, more focused on craft and stable career progression. The major employers' diverse industry mix (finance, healthcare, manufacturing, consumer goods, transportation) supports varied practice mix that can sustain a career without forcing specialization too early.

Cost of living is the persistent advantage. A senior DS earning $200,000 in Chicago lives meaningfully better than a senior DS earning $200,000 in NYC or SF — measurably more square footage, closer commutes, lower restaurant prices. The savings rate over a 5–10 year DS career is genuinely material.

Winter is the persistent caveat. Chicago winters from December through March are real — wind chill, lake-effect snow, gray skies. DS professionals who relocate from warmer markets often describe the first winter as a meaningful adjustment. Spring through fall, Chicago is one of the more livable major US cities.

Year 1-3 (Junior / New Grad DS): $130K-$200K total comp. Chicago FAANG / DuPage corporate / smaller fintech entry tier. PhD new grads at Jump Trading / DRW higher ($200K-$300K). Building SQL + Python + ML fundamentals. MBR + Backdoor Roth from year 1.

Year 3-7 (Mid-Level / Senior DS): $200K-$350K total comp. Senior level. Quant tier accelerates fastest — Jump Trading / DRW senior research scientist comp $350K-$600K.

Year 7-15 (Staff / Principal / Senior Quant Researcher): $300K-$700K total comp. Staff at FAANG Chicago / Senior Quant Researcher at top funds. PnL-tied comp at quant tier $500K-$1.5M with strong year.

Year 15+ (Distinguished / Senior Principal / Quant Partner): $700K-$3M+ total comp. Top tier. Partnership / equity at hedge fund + carry distributions taxed at IL 4.95% — meaningful relative to NYC 14.78%.

FIRE in IL is favorable — moderate 4.95% state tax during career + IL retirement income exemption + Cook → DuPage property tax arbitrage + Lake Michigan / Chicago lifestyle. Senior IL DS earning $400K-$1M with disciplined retirement contributions can accumulate $4M-$10M by age 45-50. Most senior IL DS retire in-state — IL retirement income exemption removes incentive to relocate. Chicago / Naperville / Hinsdale lifestyle + IL retirement tax structure favorable through retirement.