Marine Biologist Salary in Chicago, IL — 2026
Marine Biologist salary data for Chicago, IL — adjusted for local cost of living. Entry-level to senior pay ranges, take-home pay calculator, and local job market insights.
The median Marine Biologist salary in Chicago, IL is $71,690 per year ($5,974/month, $34/hr). This reflects the local cost of living index of 107, which is 7% above the national average.
Marine Biologist Take-Home Pay in Chicago
Tax Breakdown (Median Salary)
| Gross Annual | $71,690 |
| Federal Tax | -$6,942 |
| State Tax (5.0%) | -$3,549 |
| FICA (SS + Medicare) | -$5,484 |
| Annual Take-Home | $55,715 |
| Monthly Take-Home | $4,643 |
Living Cost Comparison
Marine Biologist Requirements
Key Skills
Chicago Job Market Overview
Chicago, Illinois has a population of 2,696,555 and an unemployment rate of 4.2%. The top industries are Finance, Technology, Healthcare. The local job growth rate is 1.5%, and the average commute time is 35 minutes.
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Salary Percentile Breakdown — Marine Biologist in Chicago
Based on the cost-of-living-adjusted distribution for Marine Biologist in Chicago, IL, here's how earnings break down across the workforce:
| Percentile | Annual Salary | Hourly Equivalent | Career Stage |
|---|---|---|---|
| 10th (lowest) | $46,010 | $22/hr | Entry-level, < 1 yr exp. |
| 25th | $58,850 | $28/hr | Junior, 1-3 yrs exp. |
| 50th (median) | $71,690 | $34/hr | Mid-career, 2-4 years |
| 75th | $89,880 | $43/hr | Senior, 5-10 yrs exp. |
| 90th (top) | $120,910 | $58/hr | Lead/Principal, 10+ yrs |
Percentiles estimated using a log-normal salary distribution model calibrated to Marine Biologist compensation data. Top earners (P90) typically include managers, specialists with rare skills, or those at high-paying employers in Chicago's Finance sector.
5-Year Salary Trajectory
Marine Biologist salaries in Chicago have grown approximately 15.0% over the past 5 years, outpacing local CPI inflation in many cases. Here's the historical and projected trajectory:
Year-over-year, an average Marine Biologist can expect a 11.8% annual increase moving from entry to senior level over 6 years in Chicago. Negotiation, certifications (PADI Certification, Scientific Diving), and changing employers strategically can accelerate this trajectory.
Chicago vs National Average
The national median Marine Biologist salary is $67,000. In Chicago, the cost-of-living-adjusted median of $71,690 is 7.0% above the national figure. This reflects Chicago's cost of living index of 107 (higher than the national average of 100).
For Marine Biologists, this means: rent typically consumes 37.7% of take-home pay (households spending >30% are considered rent-burdened), and a median home in Chicago costs about 5.7× annual take-home. Homeownership in Chicago on this salary is challenging — most experts recommend keeping home costs to 3-4× income.
Industry Context: Finance in Chicago
Chicago's economy is anchored by Finance, Technology, Healthcare, with 2,696,555 residents and 4.2% unemployment as of 2026. Marine Biologists working in the Finance sector typically earn at or above the local median due to industry-specific demand. The state's overall job growth rate is 1.5%, and Marine Biologist occupations specifically are projected to grow 5.0% nationally through 2034 (BLS Occupational Outlook Handbook).
Methodology & Data Sources
How we calculate Marine Biologist salaries in Chicago, IL:
- Base salary model starts with Salario occupation data and public wage references, including BLS OEWS and O*NET when a direct or related occupational crosswalk is available. For niche titles, we do not treat a broader SOC family as an exact job-title wage.
- Cost-of-living adjustment applied using the Chicago index of 107 relative to the national baseline of 100, with local rent, home price, unemployment, and tax inputs checked separately.
- Percentile distribution (P10-P90) estimated from the entry, median, senior, and top compensation tiers in the Salario salary model rather than claimed as exact employer payroll data.
- Take-home pay calculated using 2026 federal tax brackets (10%-37%), IL state income tax of 5.0%, and FICA (Social Security 6.2% + Medicare 1.45%).
- Tax brackets and standard deduction ($16,100 single filer for tax year 2026) sourced from IRS Revenue Procedure 2025-32 and updated annually.
Authoritative data sources:
- BLS Occupational Employment and Wage Statistics — national and metro-area salary data
- O*NET OnLine — occupation tasks, alternate job titles, skills, and SOC crosswalks
- BLS Occupational Outlook Handbook — occupation outlook where a matching profile is available
- BLS Consumer Price Index (CPI-U) — regional inflation and cost-of-living data
- U.S. Census Bureau — Chicago QuickFacts — population and demographic data
- IRS Revenue Procedure 2025-32 summary — 2026 federal tax brackets and standard deductions
- BLS Local Area Unemployment Statistics — Chicago unemployment rate
Last reviewed: 2026. Salary data updated annually as new BLS releases become available. Marine Biologist salaries can vary significantly based on employer, sector (Finance vs others in Chicago), specific skill set (Marine Ecology, Fieldwork, Data Analysis), and individual negotiation. Always verify current compensation through multiple sources before making career decisions.
Frequently Asked Questions
What is the average Marine Biologist salary in Chicago, IL?
How much does a Marine Biologist take home in Chicago after taxes?
Is Chicago a good city for Marine Biologists?
What skills are needed for a Marine Biologist in Chicago?
How does Marine Biologist salary in Chicago compare to the national average?
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Frequently Asked Questions
What is the average Marine Biologist salary in Chicago, IL?
The median Marine Biologist salary in Chicago, IL is $71,690 per year as of 2026. This is adjusted for the local cost of living index of 107. Entry-level Marine Biologists earn around $46,010, while senior-level professionals can earn $89,880 or more.
How much does a Marine Biologist take home in Chicago after taxes?
A Marine Biologist earning the median salary of $71,690 in Chicago, IL takes home approximately $55,715 per year ($4,643/month) after federal, state, and local taxes. The effective tax rate is 22.3%.
Is Chicago a good city for Marine Biologists?
Chicago, IL has a cost of living index of 107 (above national average). Marine Biologists here earn below the city median. The local unemployment rate is 4.2% and top industries include Finance, Technology, Healthcare.
What skills are needed for a Marine Biologist in Chicago?
Key skills for Marine Biologists include Marine Ecology, Fieldwork, Data Analysis, Scuba Diving, GIS. Typical education requirement is Master's Degree. Valuable certifications include PADI Certification, Scientific Diving.
How does Marine Biologist salary in Chicago compare to the national average?
The national median Marine Biologist salary is $67,000. In Chicago, the adjusted salary is $71,690, which is 7.0% higher than the national average, reflecting the local cost of living.