Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Massachusetts's licence ladder. Updated nightly.
Massachusetts has 105 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 8 counties, 0.1 per 10,000 residents. That is 0.8 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 |
|---|---|---|---|
| Essex County | 36 | 34% | 0.4 |
| Middlesex County | 32 | 30% | 0.2 |
| Bristol County | 18 | 17% | 0.3 |
| Worcester County | 8 | 8% | 0.1 |
| Norfolk County | 4 | 4% | 0.1 |
| Plymouth County | 4 | 4% | 0.1 |
| Hampden County | 2 | 2% | 0.0 |
| Suffolk County | 1 | 1% | 0.0 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Massachusetts records apprentices on its own plumber licence register as Plumbing Apprentice: 4,613 active apprentice-tier records against 13,961 journeyman records, a ratio of 0.33 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 Board of State Examiners of Plumbers and Gas Fitters, Massachusetts Division of Occupational Licensure issues for this trade: Apprentice Plumber, Journeyman Plumber, Master Plumber, Apprentice / Journeyman / Master Gas Fitter, LP Gas Installer. See how to get a plumber license in Massachusetts 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: Massachusetts register read September 16, 2026; population: U.S. Census 2023 estimates.
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