Registered fire sprinkler fitter apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Wisconsin's license ladder. Updated nightly.
Wisconsin has 257 registered fire sprinkler fitter apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 40 counties, 0.4 per 10,000 residents. That is 2.5 apprentices for every 100 employed fire sprinkler fitters in the state, the rate at which the trade is training its own replacements.
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Registered fire sprinkler fitter apprentices by county of the apprentice, largest first. Each county links to its fire sprinkler fitters market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Waukesha County | 44 | 17% | 1.1 |
| Dane County | 37 | 14% | 0.6 |
| Outagamie County | 16 | 6% | 0.8 |
| Rock County | 16 | 6% | 1.0 |
| St. Croix County | 13 | 5% | 1.3 |
| Winnebago County | 13 | 5% | 0.8 |
| Columbia County | 12 | 5% | 2.1 |
| Sauk County | 9 | 4% | 1.4 |
| Fond du Lac County | 8 | 3% | 0.8 |
| Waupaca County | 8 | 3% | 1.6 |
| Chippewa County | 6 | 2% | 0.9 |
| Green County | 6 | 2% | 1.6 |
| Brown County | 5 | 2% | 0.2 |
| Marathon County | 5 | 2% | 0.4 |
| Portage County | 5 | 2% | 0.7 |
| 25 other counties | 54 | 21% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
Wisconsin records apprentices on its own fire sprinkler fitter license register as Automatic Fire Sprinkler System Apprentice: 194 active apprentice-tier records against 818 journeyman records, a ratio of 0.24 apprentice records per journeyman, register read October 6, 2026. The register's apprentice tier and the federal registered-apprenticeship count in the county table are two different systems: a license-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 Wisconsin Department of Safety and Professional Services, Division of Professional Credential Processing issues for this trade: Automatic Fire Sprinkler Contractor (license), Journeyman Automatic Fire Sprinkler Fitter (license), Automatic Fire Sprinkler System Apprentice (registration), Automatic Fire Sprinkler Contractor Maintenance (registration), Automatic Fire Sprinkler Fitter Maintenance (registration), Automatic Fire Sprinkler System Tester (registration), Automatic Fire Sprinkler System Tester Learner (registration). See how to get a fire sprinkler fitter license in Wisconsin 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); license tiers: Wisconsin register read October 6, 2026; population: U.S. Census 2023 estimates.
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