Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Colorado's licence ladder. Updated nightly.
Colorado has 487 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 25 counties, 0.8 per 10,000 residents. That is 4.2 apprentices for every 100 employed plumbers in the state, the rate at which the trade is training its own replacements.
A free report on your market: what the trade pays, how that compares with nearby counties, and where your credential sits against the local licensed workforce. No account needed.
Registered plumber apprentices by county of the apprentice, largest first. Each county links to its plumbers market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Adams County | 103 | 21% | 1.9 |
| Arapahoe County | 62 | 13% | 0.9 |
| El Paso County | 57 | 12% | 0.8 |
| Jefferson County | 53 | 11% | 0.9 |
| Denver County | 43 | 9% | 0.6 |
| Weld County | 33 | 7% | 0.9 |
| Mesa County | 28 | 6% | 1.8 |
| Douglas County | 20 | 4% | 0.5 |
| Larimer County | 19 | 4% | 0.5 |
| Boulder County | 16 | 3% | 0.5 |
| Garfield County | 10 | 2% | 1.6 |
| Pueblo County | 10 | 2% | 0.6 |
| Broomfield County | 7 | 1% | 0.9 |
| Gunnison County | 7 | 1% | 4.0 |
| Eagle County | 5 | 1% | 0.9 |
| 10 other counties | 14 | 3% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Colorado records apprentices on its own plumber licence register as Plumbing Apprentice: 9,776 active apprentice-tier records against 2,918 journeyman records, a ratio of 3.35 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 Colorado State Plumbing Board, Division of Professions and Occupations (DPO), Department of Regulatory Agencies issues for this trade: Residential Plumber, Journeyworker Plumber, Master Plumber, Plumbing Contractor. See how to get a plumber license in Colorado 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: Colorado register read September 16, 2026; population: U.S. Census 2023 estimates.
This page is a free snapshot of plumbers in Colorado. Track the same market every night and see which contractors just got licensed, added a trade, or dropped off, and pull the full record, with contact details, on any of them. Ask it anything, track what matters, and get the weekly intelligence email. Free trial, cancel anytime.