Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Michigan's licence ladder. Updated nightly.
Michigan has 504 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 57 counties, 0.5 per 10,000 residents. That is 3.8 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 |
|---|---|---|---|
| Wayne County | 78 | 15% | 0.4 |
| Macomb County | 66 | 13% | 0.8 |
| Kent County | 40 | 8% | 0.6 |
| Berrien County | 39 | 8% | 2.6 |
| Oakland County | 30 | 6% | 0.2 |
| Saginaw County | 27 | 5% | 1.4 |
| Ottawa County | 22 | 4% | 0.7 |
| St. Clair County | 22 | 4% | 1.4 |
| Allegan County | 18 | 4% | 1.5 |
| Bay County | 10 | 2% | 1.0 |
| Midland County | 10 | 2% | 1.2 |
| Monroe County | 9 | 2% | 0.6 |
| Cass County | 8 | 2% | 1.5 |
| Kalamazoo County | 7 | 1% | 0.3 |
| Shiawassee County | 7 | 1% | 1.0 |
| 42 other counties | 111 | 22% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Michigan records apprentices on its own plumber licence register as Plumbing Apprentice: 6,130 active apprentice-tier records against 4,811 journeyman records, a ratio of 1.27 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 Michigan Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes, Licensing Section, Plumbing Division issues for this trade: Plumbing Apprentice (registration), Journey Plumber, Master Plumber, Plumbing Contractor. See how to get a plumber license in Michigan 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: Michigan register read September 16, 2026; population: U.S. Census 2023 estimates.
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