Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Minnesota's licence ladder. Updated nightly.
Minnesota has 689 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 51 counties, 1.2 per 10,000 residents. That is 8.1 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 |
|---|---|---|---|
| Hennepin County | 90 | 13% | 0.7 |
| St. Louis County | 69 | 10% | 3.4 |
| Dakota County | 60 | 9% | 1.3 |
| Washington County | 54 | 8% | 1.9 |
| Ramsey County | 53 | 8% | 1.0 |
| Anoka County | 52 | 8% | 1.4 |
| Olmsted County | 24 | 3% | 1.5 |
| Wright County | 23 | 3% | 1.5 |
| Goodhue County | 20 | 3% | 4.2 |
| Stearns County | 20 | 3% | 1.2 |
| Itasca County | 17 | 2% | 3.7 |
| Wabasha County | 17 | 2% | 7.8 |
| Sherburne County | 13 | 2% | 1.3 |
| Dodge County | 12 | 2% | 5.7 |
| Scott County | 12 | 2% | 0.8 |
| 36 other counties | 153 | 22% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Minnesota records apprentices on its own plumber licence register as Plumbing Registered Unlicensed Plumber: 2,604 active apprentice-tier records against 6,811 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 Minnesota Department of Labor and Industry (DLI), Construction Codes and Licensing issues for this trade: Registered Unlicensed Plumber, Journeyworker Plumber, Master Plumber, Restricted Journeyworker / Restricted Master, Plumbing Contractor. See how to get a plumber license in Minnesota 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: Minnesota register read September 16, 2026; population: U.S. Census 2023 estimates.
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