Bolingbrook vs Springfield: Mechanical Engineer Salary (2026)
Compare mechanical engineer salaries between Bolingbrook, IL and Springfield, IL. All figures are 2026 estimates projected from BLS 2025 data.
Side-by-Side Comparison
| Metric | Bolingbrook, IL | Springfield, IL |
|---|---|---|
| Median Salary | $104,428▲ | $95,633 |
| Hourly Rate | $50.20▲ | $45.97 |
| Entry Level (P10) | $70,252▲ | $61,968 |
| 25th Percentile | $87,219▲ | $79,598 |
| 75th Percentile | $131,345▲ | $123,380 |
| Top Earner (P90) | $161,324▲ | $146,332 |
| Total Employed | 19 | 90▲ |
Verdict
Bolingbrook, IL offers better overall compensation for mechanical engineers, winning 3 out of 4 metrics compared to Springfield.
The salary gap between Bolingbrook and Springfield is $8,795 (9.20%). Bolingbrook's median is -2.54% compared to the US national median of $107,150.
Salary Range Comparison
The full salary range (10th to 90th percentile) in Bolingbrook spans $91,072,Springfield spans $84,364. Bolingbrook has a wider pay range, meaning more potential for high earners but also more variation.
Cost-of-Living Adjusted Comparison
After cost-of-living adjustment, Bolingbrook ($107,547 effective) pays 4.30% more than Springfield ($103,114 effective).
Cost-of-living adjustment: salary × (100 / CoL index). Index of 100 = national average.
Which City Is Right for You?
Choose Bolingbrook if…
- ✓Higher median salary ($104,428/year)
- ✓Better top-earner potential ($161,324)
- ✓Better purchasing power (CoL-adjusted: $107,547)
- ✓You prefer the Illinois area and lifestyle
Choose Springfield if…
- ✓Larger job market (90 employed)
- ✓You prefer the Illinois area and lifestyle
Historical Salary Growth Comparison
Based on BLS OEWS metropolitan area data, mechanical engineer salaries in Bolingbrook grew 1.5% from 2024 to 2025, compared to -3.0% growth in Springfield over the same period.
Bolingbrook, IL
$99,993 (2024) → $101,465 (2025)
Springfield, IL
$95,760 (2019) → $92,920 (2025)
View Full Salary Data
Bolingbrook, IL
Springfield, IL
Frequently Asked Questions
Which city pays mechanical engineers more: Bolingbrook or Springfield?
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Related Comparisons
Written by Amina Patel, PE
Career Analyst
Amina has 10 years of experience in mechanical engineering. She specializes in thermal analysis and works in the automotive industry.
Methodology & Data Source
All salary figures are 2026 projections based on BLS OEWS May 2025 data. A 2.92% CAGR (derived from 6-year national BLS trends) was applied to estimate current compensation. Cost-of-living adjustments use BEA Regional Price Parity data. Actual salaries vary by employer, certifications, and experience.
Data Sources & Methodology
Source: BLS, OEWS , released .
Compiled and verified by Amina Patel, PE, a licensed mechanical engineer with 10+ years of clinical experience. · View source data at BLS.gov