Stationary Engineers and Boiler Operators salary in St. Louis, MO-IL
Stationary Engineers and Boiler Operators in the St. Louis, MO-IL metro area earn a median of $75,610 a year ($36.35 an hour), based on BLS data for 240 workers.
Pay ranges from $61,570 for the lowest-paid 10% to $96,730 for the top 10%. That is 4% lower than the national median of $78,620. Pay here is 4% higher than the Missouri statewide median of $72,620. There are 0.18 stationary engineers and boiler operators per 1,000 jobs here — close to the national average. The average (mean) salary is $77,240, above the median because a few high earners pull it up.
Pay range for stationary engineers and boiler operators in St. Louis, MO-IL
| Pay level | Yearly | Hourly |
|---|---|---|
| 10th percentile (entry level) | $61,570 | $29.60 |
| 25th percentile | $66,650 | $32.04 |
| Median | $75,610 | $36.35 |
| 75th percentile | $85,070 | $40.90 |
| 90th percentile (top earners) | $96,730 | $46.51 |
| Average (mean) | $77,240 | $37.14 |
Half of stationary engineers and boiler operators earn more than the median and half earn less. Percentiles show the spread: 10% earn less than the 10th percentile, and 10% earn more than the 90th.
Median paycheck, before taxes
| Pay period | Amount |
|---|---|
| Monthly | $6,300.83 |
| Semi-monthly (24 a year) | $3,150.42 |
| Biweekly (26 a year) | $2,908.08 |
| Weekly | $1,454.04 |
| Hourly | $36.35 |
Based on a full-time year of 2,080 hours. Convert any amount with the hourly to salary converter.
Buying a home? On a $75,610 salary, see how much house you can afford in Missouri at today's mortgage rates, or work out a payment with the mortgage calculator.
Stationary Engineers and Boiler Operators salary in other metro areas nearby
| Metro area | Median salary | Workers |
|---|---|---|
| Springfield, IL | $117,590 | 60 |
| Chicago-Naperville-Elgin, IL-IN | $115,780 | 1,210 |
| Davenport-Moline-Rock Island, IA-IL | $85,180 | 40 |
| Kansas City, MO-KS | $74,540 | 40 |
| Springfield, MO | $51,090 | 30 |
Highest-paying states for stationary engineers and boiler operators
| State | Median salary |
|---|---|
| Illinois | $115,780 |
| Wyoming | $111,920 |
| Hawaii | $103,400 |
| Connecticut | $94,870 |
| New York | $94,070 |
| Washington | $91,530 |
| California | $90,650 |
| District of Columbia | $90,470 |
| Alaska | $88,330 |
| Maryland | $85,240 |
See Stationary Engineers and Boiler Operators pay in every state or the Missouri statewide figures.
Related jobs in St. Louis, MO-IL
| Job | Median salary | Hourly |
|---|---|---|
| Water and Wastewater Treatment Plant and System Operators | $57,850 | $27.81 |
| Chemical Plant and System Operators | $52,330 | $25.16 |
| Plant and System Operators, All Other | $69,910 | $33.61 |
| Power Distributors and Dispatchers | $85,470 | $41.09 |
| Power Plant Operator | $101,820 | $48.95 |
| Miscellaneous Assemblers and Fabricators | $46,570 | $22.39 |
| First-Line Supervisors of Production and Operating Workers | $75,210 | $36.16 |
| Machinist | $62,210 | $29.91 |
| Inspectors, Testers, Sorters, Samplers, and Weighers | $51,790 | $24.90 |
| Packaging and Filling Machine Operators and Tenders | $47,460 | $22.82 |
| Multiple Machine Tool Setters, Operators, and Tenders, Metal and Plastic | $62,090 | $29.85 |
| Production Workers, All Other | $40,900 | $19.66 |
| Welders, Cutters, Solderers, and Brazers | $51,640 | $24.83 |
| Helpers--Production Workers | $40,190 | $19.32 |
More: Production Occupations · all salaries in St. Louis, MO-IL
Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025 estimates, occupation code 51-8021. Wages include base pay, tips, commissions and shift pay, but not overtime, bonuses or benefits, and exclude the self-employed.
Frequently asked questions
How much does a stationary engineers and boiler operators make in St. Louis, MO-IL?
The median salary for stationary engineers and boiler operators in the St. Louis, MO-IL metro area is $75,610 a year, or $36.35 an hour. Pay ranges from $61,570 for the lowest-paid 10% to $96,730 for the top 10%.
How much do the highest-paid stationary engineers and boiler operators make in St. Louis, MO-IL?
The top 10% of stationary engineers and boiler operators in the St. Louis, MO-IL metro area earn at least $96,730 a year. The top 25% earn $85,070 or more.
What is the starting pay for stationary engineers and boiler operators in St. Louis, MO-IL?
Entry-level pay (the 10th percentile) is about $61,570 a year, and a quarter of stationary engineers and boiler operators earn $66,650 or less.
How many stationary engineers and boiler operators work in St. Louis, MO-IL?
About 240 stationary engineers and boiler operators are employed in the St. Louis, MO-IL metro area, not counting the self-employed.