Registered boiler operator apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Indiana's licence ladder. Updated nightly.
Indiana has 103 registered boiler operator apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 24 counties, 0.2 per 10,000 residents. That is 367.9 apprentices for every 100 employed boiler operators in the state, the rate at which the trade is training its own replacements.
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Registered boiler operator apprentices by county of the apprentice, largest first. Each county links to its boiler operators market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Lake County | 33 | 32% | 0.7 |
| Porter County | 20 | 19% | 1.1 |
| LaPorte County | 14 | 14% | 1.3 |
| Vigo County | 5 | 5% | 0.5 |
| Marshall County | 3 | 3% | 0.6 |
| Warrick County | 3 | 3% | 0.5 |
| Harrison County | 2 | 2% | 0.5 |
| Parke County | 2 | 2% | 1.2 |
| Perry County | 2 | 2% | 1.0 |
| Pike County | 2 | 2% | 1.7 |
| Spencer County | 2 | 2% | 1.0 |
| Vanderburgh County | 2 | 2% | 0.1 |
| Washington County | 2 | 2% | 0.7 |
| Daviess County | 1 | 1% | 0.3 |
| Dearborn County | 1 | 1% | 0.2 |
| 9 other counties | 9 | 9% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Credential types the Indiana boiler and pressure vessel safety programme, commonly administered by the state Department of Labor or an equivalent boiler safety division issues for this trade: Stationary Engineer / Boiler Operator licence, graded by plant size, State boiler and pressure vessel certificate of operation (on the equipment). See how to get a boiler operator license in Indiana for hours, exams and renewal.
Sources: registered apprentices: DOL RAPIDS apprenticeship FY2025, active status, as of December 31, 2025; employment: BLS QCEW construction x OEWS occupation share (estimate); population: U.S. Census 2023 estimates.
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