Registered HVAC technician apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Ohio's licence ladder. Updated nightly.
Ohio has 476 registered HVAC technician apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 51 counties, 0.4 per 10,000 residents. That is 3.3 apprentices for every 100 employed HVAC technicians in the state, the rate at which the trade is training its own replacements.
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Registered HVAC technician apprentices by county of the apprentice, largest first. Each county links to its HVAC technicians market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Franklin County | 64 | 13% | 0.5 |
| Lucas County | 60 | 13% | 1.4 |
| Hamilton County | 30 | 6% | 0.4 |
| Wood County | 28 | 6% | 2.1 |
| Montgomery County | 25 | 5% | 0.5 |
| Stark County | 25 | 5% | 0.7 |
| Summit County | 24 | 5% | 0.4 |
| Fairfield County | 18 | 4% | 1.1 |
| Warren County | 17 | 4% | 0.7 |
| Butler County | 16 | 3% | 0.4 |
| Clermont County | 14 | 3% | 0.7 |
| Mahoning County | 10 | 2% | 0.4 |
| Trumbull County | 10 | 2% | 0.5 |
| Allen County | 9 | 2% | 0.9 |
| Fulton County | 9 | 2% | 2.1 |
| 36 other counties | 117 | 25% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
The Ohio register ATI reads carries no separate apprentice-tier credential for HVAC technicians; its ladder for this trade starts at Journeyman (2,843 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 Ohio Construction Industry Licensing Board (OCILB), Ohio Department of Commerce, Division of Industrial Compliance issues for this trade: HVAC Contractor (OCILB state licence, commercial work), Local journeyman/residential registration issued by the municipality or county. See how to get a HVAC technician license in Ohio 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: Ohio register read September 16, 2026; population: U.S. Census 2023 estimates.
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