Registered plumber 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 3,394 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 89 counties, 4.9 per 10,000 residents. That is 30.7 apprentices for every 100 employed plumbers in the state, the rate at which the trade is training its own replacements.
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Registered plumber apprentices by county of the apprentice, largest first. Each county links to its plumbers market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Marion County | 469 | 14% | 4.8 |
| Vanderburgh County | 331 | 10% | 18.4 |
| Allen County | 286 | 8% | 7.2 |
| Johnson County | 193 | 6% | 11.5 |
| Lake County | 156 | 5% | 3.1 |
| Hamilton County | 116 | 3% | 3.1 |
| Hendricks County | 103 | 3% | 5.5 |
| St. Joseph County | 99 | 3% | 3.6 |
| Madison County | 85 | 3% | 6.4 |
| Vigo County | 70 | 2% | 6.6 |
| Howard County | 66 | 2% | 7.9 |
| Morgan County | 64 | 2% | 8.7 |
| Tippecanoe County | 64 | 2% | 3.4 |
| Hancock County | 62 | 2% | 7.2 |
| Delaware County | 52 | 2% | 4.6 |
| 74 other counties | 1,178 | 35% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Indiana records apprentices on its own plumber licence register as Plumbing Apprentice: 3,620 active apprentice-tier records against 4,030 journeyman records, a ratio of 0.9 apprentice records per journeyman, register read September 16, 2026. The register's apprentice tier and the federal registered-apprenticeship count in the county table are two different systems: a licence-register apprentice is anyone the state has credentialed to work under supervision, a registered apprentice is enrolled in a DOL-registered program.
Counts are license records, not people: a holder with more than one license appears once per license, and a contractor license is a business, not a worker.
Credential types the Indiana Plumbing Commission, Indiana Professional Licensing Agency (PLA) issues for this trade: Apprentice Plumber (registration), Journeyman Plumber, Plumbing Contractor. See how to get a plumber 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); licence tiers: Indiana register read September 16, 2026; population: U.S. Census 2023 estimates.
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