St. Louis vs Wentzville: Mechanical Engineer Salary (2026)
Compare mechanical engineer salaries between St. Louis, MO and Wentzville, MO. All figures are 2026 estimates projected from BLS 2025 data.
Side-by-Side Comparison
| Metric | St. Louis, MO | Wentzville, MO |
|---|---|---|
| Median Salary | $103,270▲ | $87,458 |
| Hourly Rate | $49.65▲ | $42.04 |
| Entry Level (P10) | $67,824▲ | $65,561 |
| 25th Percentile | $82,068▲ | $70,245 |
| 75th Percentile | $123,525▲ | $109,703 |
| Top Earner (P90) | $153,413▲ | $133,296 |
| Total Employed | 2,190▲ | 10 |
Verdict
St. Louis, MO offers better overall compensation for mechanical engineers, winning 4 out of 4 metrics compared to Wentzville.
The salary gap between St. Louis and Wentzville is $15,812 (18.08%). St. Louis's median is -3.62% compared to the US national median of $107,150.
Salary Range Comparison
The full salary range (10th to 90th percentile) in St. Louis spans $85,589,Wentzville spans $67,735. St. Louis 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, St. Louis ($108,605 effective) pays 11.26% more than Wentzville ($97,609 effective).
Cost-of-living adjustment: salary × (100 / CoL index). Index of 100 = national average.
Which City Is Right for You?
Choose St. Louis if…
- ✓Higher median salary ($103,270/year)
- ✓Better top-earner potential ($153,413)
- ✓Larger job market (2,190 employed)
- ✓Better purchasing power (CoL-adjusted: $108,605)
- ✓You prefer the Missouri area and lifestyle
Choose Wentzville if…
- ✓You prefer the Missouri area and lifestyle
Historical Salary Growth Comparison
Based on BLS OEWS metropolitan area data, mechanical engineer salaries in St. Louis grew 15.6% from 2019 to 2025, compared to 8.1% growth in Wentzville over the same period.
St. Louis, MO
$86,830 (2019) → $100,340 (2025)
Wentzville, MO
$78,600 (2024) → $84,977 (2025)
View Full Salary Data
St. Louis, MO
Wentzville, MO
Frequently Asked Questions
Which city pays mechanical engineers more: St. Louis or Wentzville?
What is the hourly rate difference between St. Louis and Wentzville?
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What do entry-level mechanical engineers earn in St. Louis vs Wentzville?
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