Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Oregon's licence ladder. Updated nightly.
Oregon has 871 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 9 counties, 2.1 per 10,000 residents. That is 17.9 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 |
|---|---|---|---|
| Clackamas County | 279 | 32% | 6.6 |
| Lane County | 213 | 24% | 5.6 |
| Marion County | 184 | 21% | 5.3 |
| Washington County | 124 | 14% | 2.1 |
| Umatilla County | 47 | 5% | 5.9 |
| Clatsop County | 11 | 1% | 2.7 |
| Klamath County | 8 | 1% | 1.1 |
| Yamhill County | 3 | 0% | 0.3 |
| Jackson County | 2 | 0% | 0.1 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
The Oregon register ATI reads carries no separate apprentice-tier credential for plumbers; its ladder for this trade starts at Journeyman (4,644 active records, read September 16, 2026). Registered apprentices in the county table above are counted from the federal apprenticeship system, not from the licence register.
Credential types the Oregon Building Codes Division (BCD), Department of Consumer and Business Services issues for this trade: Apprentice Plumber (registered via BOLI apprenticeship), Journeyman Plumber (JP), Water Heater Installer / other specialty certs, (Plumbing contractors licensed separately by the Construction Contractors Board). See how to get a plumber license in Oregon 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: Oregon register read September 16, 2026; population: U.S. Census 2023 estimates.
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