Diesel Mechanics in the St. Louis area earn a median of $62,280 a year, 3% above the typical U.S. metro. That ranks #124 of 388 metros nationwide.
Within driving distance, the same work pays more in Decatur and Paducah, but less in Springfield.
St. Louis scorecard for diesel mechanics Our calculation
Grades compare St. Louis with every other U.S. metro for this trade (A = top 20%).
Pay Government data
Pay range
Shaded: the middle half of workers. Grey line: typical U.S. metro ($60,355).
Pay over time
The median pay for diesel mechanics in the St. Louis area went from $46,250 in 2020 to $62,280 in 2025, up 34.7%. Prices rose 25% over the same period, so after inflation that's +7.4% — a real raise.
BLS OEWS, May 2020–May 2025; inflation: CPI-U (May to May). Year-to-year changes can include survey noise.
Compared with nearby metros
What the pay is really worth in St. Louis Our calculation
Prices in St. Louis run 5% below the U.S. average. Adjusted for that, a median paycheck here buys what $65,497 would in a typical place, ranking #137 of 383 on real pay.
Two different views, don't combine them. Real pay already accounts for housing, because the price index includes rent. Rent burden shows what share of pay a typical 1-bedroom takes. Use either one, not both together.
What diesel mechanics do
Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.
Most important day-to-day tasks
- Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
- Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.
- Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
- Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
- Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
Outlook & getting started
Nationally, diesel mechanic jobs are projected to grow 3.6% from 2025 to 2035 (all jobs: 3.5%), with about 24,400 openings a year. About 6% are self-employed.
What the work is like Government data
How often diesel mechanics deal with each condition, from surveys of workers in the job.
Getting started usually takes medium preparation (vocational training or an apprenticeship, often 1–2+ years).
O*NET 31.0 Work Context and Job Zones (U.S. Department of Labor), national.
Licensing in Missouri Official source
Missouri licenses most trades at the city or county level. Check with the building or licensing office where you plan to work.
Requirements for diesel mechanics vary by state and sometimes by city; always confirm with the official agency.
On-the-job safety Government data
Nationally, diesel mechanics have 163 injuries or illnesses serious enough to miss work per 10,000 full-time workers, 1.9× the rate for all jobs (87). The most common cause is being struck by or caught in objects and equipment.
BLS Survey of Occupational Injuries and Illnesses, 2023–2024 (national, cases with days away from work).
Highest-paying MO metros for diesel mechanics
| Metro | Median | Real pay | Jobs |
|---|---|---|---|
| Kansas CityMISSOURI · MO | $62,570 | $67,612 | 2,890 |
| St. LouisMISSOURI · MO | $62,280 | $65,497 | 2,610 |
| SpringfieldMISSOURI · MO | $58,840 | $66,422 | 830 |
| St. JosephMISSOURI · MO | $58,440 | $67,653 | 110 |
| JoplinMISSOURI · MO | $56,580 | $66,007 | 360 |
| ColumbiaMISSOURI · MO | $53,980 | $60,355 | 130 |
| Jefferson CityMISSOURI · MO | $53,170 | $60,438 | 120 |
| Cape GirardeauMISSOURI · MO | $51,260 | $59,551 | 90 |
See every metro in Missouri.
How much work is there? Government data
Local job market
The St. Louis area's unemployment rate was 4.0% in 2025 (all workers, not just diesel mechanics), below the typical U.S. metro's 4.1%. It was 4.4% in 2021.
BLS Local Area Unemployment Statistics, annual averages 2021–2025 (2025 preliminary).
Getting to work
The average commute in the St. Louis area is 25 minutes each way, longer than the typical metro (24 min). 13% of commuters spend 45 minutes or more. 74% drive alone, 2% take transit and 13% work from home (all workers, not just trades).
Census American Community Survey, 2024 1-year estimates (table S0801).
Population
The St. Louis area's population shrank 0.2% from 2020 to 2025 (2,819,811 → 2,814,421), ranking #301 of 387 metros for growth (typical metro +2.5%).
Census Bureau population estimates, July 1 of each year, 2020–2025.
New construction
New-home permits in St. Louis are down 27% from 2021 to 2025 (8,326 → 6,066).
In 2025 the St. Louis area approved permits for 6,066 new homes (4,142 single-family), or 2.2 per 1,000 residents, ranking #280 of 393 metros.
Competition
In 2024 the area had 1,102 one-person businesses (no employees) in auto repair, averaging $54,973 a year in revenue before expenses.
They compete with 850 auto repair companies that have employees (about 4,519 workers in total). 59% of those companies have fewer than 5 employees.
Employee vs. working for yourself Your scenario
A model, not a market rate. It shows the minimum you'd need to bill to match a $62,280 employee salary once you cover what an employer normally pays for. Change any number.
Minimum billing rate
How this calculator works. Billable hours are hours you can charge a customer. Driving, quoting, paperwork and slow weeks aren't billable, which is why 1,400 is a common starting point versus 2,080 paid hours as an employee.
Get diesel mechanic pricing & estimate templates →Compare St. Louis with another city →
About this data
- Pay: BLS Occupational Employment & Wage Statistics, May 2025, local to this metro.
- Pay over time: BLS OEWS May 2020–2025, local; inflation from the Consumer Price Index (CPI-U).
- Real pay: BEA Regional Price Parities, 2024, local.
- Rent: HUD Fair Market Rents, FY2027, local (county rents weighted by population).
- Job outlook, education, training: BLS Employment Projections 2025–35, national.
- Duties: O*NET 31.0, national.
- Safety: BLS Survey of Occupational Injuries and Illnesses, 2023–2024, national.
- New construction: Census Building Permits, 2021–2025, local.
- Housing: Census American Community Survey, 2024 1-year, local (age of homes, ownership, home values).
- Population: Census Bureau population estimates, 2020–2025, local.
- Commute: Census American Community Survey, 2024 1-year, local, all workers.
- Unemployment: BLS Local Area Unemployment Statistics, 2021–2025 annual averages, local, all workers (2025 preliminary).
- Competition: Census Nonemployer Statistics 2024 and County Business Patterns 2023, local, reported by industry, so related trades can share one figure.
- Jobs are employment estimates, not open positions. Grades rank this metro against all others for the same trade.