Mechanical engineer pay in St. Louis, MO
Mechanical engineers in the St. Louis, MO-IL metro area earn a typical $100,340 a year. The middle half earn $79,740 to $120,020, and the top 10% earn more than $149,060. About 2,190 people do this job there.
Source: BLS Occupational Employment and Wage Statistics, May 2025 (occupation: Mechanical Engineers, SOC 17-2141).
Pay range
| Bottom 10% earn less than | $65,900 |
| 25th percentile | $79,740 |
| Median (typical) | $100,340 |
| 75th percentile | $120,020 |
| Top 10% earn more than | $149,060 |
Typical pay here ranks No. 34 of 50 large metros for mechanical engineers before taxes and prices.
After taxes and cost of living
At the typical $100,340, a single filer keeps about $74,600 a year after federal, Social Security, Medicare, and Missouri state and local (about $1,003) income tax. Prices in St. Louis are 5% below the US average, so that take-home buys what $78,500 would in a typical US city. That ranks St. Louis No. 29 of 50 large metros for mechanical engineers after cost of living.
Where mechanical engineers’ pay goes furthest
- San Jose, CA$168,030 typical · worth $104k
- Houston, TX$125,350 typical · worth $98.3k
- San Francisco, CA$161,370 typical · worth $95.8k
- Memphis, TN$104,110 typical · worth $89k
All 50 metros for mechanical engineers →
Where does your salary land?
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Common questions
How much does a mechanical engineer make in St. Louis, MO?
The typical (median) mechanical engineer in the St. Louis, MO-IL metro area earns $100,340 a year. The middle half earn between $79,740 and $120,020, and the top 10% earn more than $149,060. Source: BLS Occupational Employment and Wage Statistics, May 2025.
What is a good salary for a mechanical engineer in St. Louis?
Anything above $100,340 pays more than half of mechanical engineers in St. Louis. $120,020 or more puts you in the top quarter, and $149,060 in the top 10%. Experience and employer move where you should be in that range.
How much does a mechanical engineer in St. Louis take home after taxes?
At the typical $100,340, a single filer keeps about $74,600 a year ($6,220 a month) after federal, Social Security, Medicare, Missouri state, and local income tax. With local prices 5% below the US average, that buys what $78,500 would in a typical US city.
Where do mechanical engineers get paid the most after cost of living?
Among the 50 largest US metros, typical mechanical engineer pay goes furthest after taxes and prices in San Jose, CA, Houston, TX, San Francisco, CA. St. Louis, MO ranks No. 29.
More: Mechanical engineer pay in every large metro · Pay for other jobs in St. Louis, MO
Local prices: BEA regional price parities, 2024. Updated November 2026.