- Ice Rinks, Haliburton
- Industrial & Commercial Cleaning Services & Companies, Haliburton
- Industrial & Heavy Equipment Vehicle Rental & Leasing, Haliburton
- Industrial Contractors, Haliburton
- Industrial Equipment & Machinery, Haliburton
- Industrial Generators, Haliburton
- Industrial Goods & Products - Hard Goods - Large, Haliburton
- Industrial Goods & Products - Hard Goods - Small, Haliburton
- Industrial Goods & Products - Soft - Large & Small, Haliburton
- Industrial Machinery Supplies & Equipment - Leasing & Rental, Haliburton
- Industry, Haliburton
- Insulation Contractors, Haliburton - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
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- Insurance Brokers, Haliburton
- Insurance Carriers, Haliburton
- Insurance Consulting & Information Services, Haliburton
- Insurance Services, Haliburton
- Insurance Underwriters, Haliburton
- Interior Designers, Haliburton
- Interior Designers & Decorators, Haliburton
- Internet Services, Haliburton
- Investment Services & Advisors, Haliburton
- Iron, Steel & Metal Fabricators, Haliburton - Fabrication Companies
- Italian Restaurants, Haliburton
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