Mechanical Engineers Salary in St. Louis, MO-IL
According to the latest U.S. Bureau of Labor Statistics data, the median annual wage for Mechanical Engineers in St. Louis, MO-IL is $100,340. BLS estimates approximately 2,190 people work in this occupation in St. Louis, MO-IL. St. Louis, MO-IL is 3.6% below the national median ($104,110).
Salary Distribution
Not everyone earns the median. Percentile wages show the range of pay within this occupation.
| Percentile | Annual wage | Hourly wage |
|---|---|---|
| 10th percentile | $65,900 | $31.68 |
| 25th percentile | $79,740 | $38.34 |
| Median (50th) | $100,340 | $48.24 |
| 75th percentile | $120,020 | $57.70 |
| 90th percentile | $149,060 | $71.66 |
Data Reliability
BLS OEWS is a survey, not a full census — every estimate carries a margin of error. The relative standard error (RSE) below is BLS’s own measure of how much an estimate could vary; lower is more precise.
- Wage estimate
- RSE 1.5% — Very reliable
- Employment estimate
- RSE 5.9% — Reliable
Where Does Your Salary Fall?
Enter an annual salary to see roughly where it falls among reported wages for this occupation, based on the percentile points above.
Concentration
- Jobs per 1,000
- 1.63
- Location quotient
- 0.85
Cost-of-Living Adjusted Salary
St. Louis, MO-IL’s regional price level is below the national average (index 95.088, where 100 = U.S. average). Adjusted for that, the median salary has the purchasing power of $105,523 at the national price level.
This is a Career Atlas USA calculation based on BLS wage data and BEA Regional Price Parities. It is not a separate BLS wage estimate. Wage data: May 2025. Cost-of-living data: 2024.
Sources
Wage data: BLS Occupational Employment and Wage Statistics (OEWS) — May 2025 (release 25).
Figures shown as “Not available” reflect wages the source does not publish (e.g. suppressed for reliability), not zero.