Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Maine's licence ladder. Updated nightly.
Maine has 118 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 9 counties, 0.8 per 10,000 residents. That is 5.0 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 |
|---|---|---|---|
| Cumberland County | 43 | 36% | 1.4 |
| York County | 43 | 36% | 2.0 |
| Penobscot County | 13 | 11% | 0.8 |
| Somerset County | 7 | 6% | 1.4 |
| Androscoggin County | 4 | 3% | 0.4 |
| Kennebec County | 4 | 3% | 0.3 |
| Waldo County | 2 | 2% | 0.5 |
| Oxford County | 1 | 1% | 0.2 |
| Sagadahoc County | 1 | 1% | 0.3 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Maine records apprentices on its own plumber licence register as FUEL APPRENTICE: 3,122 active apprentice-tier records against 8,220 journeyman records, a ratio of 0.38 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 Maine Plumbers' Examining Board, Office of Professional and Occupational Regulation issues for this trade: Trainee Plumber, Journeyman-in-Training, Journeyman Plumber, Master Plumber. See how to get a plumber license in Maine 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: Maine register read September 16, 2026; population: U.S. Census 2023 estimates.
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