- Ice Cream & Frozen Yogurt, Holyoke
- Ice Making Equipment, Holyoke - Ice Machines
- Ice Skating Rinks, Holyoke
- Imprinting & Embossing Services, Holyoke
- Individual & Family Services, Holyoke
- Industrial & Commercial Cleaning Services & Companies, Holyoke
- Industrial & Commercial Real Estate, Holyoke
- Industrial & Personal Service Paper, Boxes & Cardboard, Holyoke
- Industrial Contractors, Holyoke
- Industrial Equipment & Machinery, Holyoke
- Industrial Goods & Products - Hard Goods - Large, Holyoke
- Industrial Goods & Products - Hard Goods - Small, Holyoke
- Industrial Goods & Products - Soft - Large & Small, Holyoke
- Industrial Supply, Parts & Equipment - Miscellaneous, Holyoke
- Industry, Holyoke
- Information Bureaus & Services, Holyoke
- Inspection & Testing Services, Holyoke
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- Insulation Contractors, Holyoke - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
- Insurance Brokers, Holyoke
- Insurance Carriers, Holyoke
- Insurance Carriers By Specialty, Holyoke
- Insurance Claim Processing Services, Holyoke
- Insurance Employee Benefits, Holyoke
- Insurance Motorcycles, Holyoke
- Insurance Services, Holyoke
- Insurance Supplemental, Holyoke
- Interior Designers & Decorators, Holyoke
- Internal Medicine Doctors, Holyoke - Internists Physicians & Surgeons
- Internet Providers, Holyoke
- Internet Services, Holyoke
- Investment Management Services, Holyoke
- Investment Services & Advisors, Holyoke
- Invitations & Announcements, Holyoke - Baby Announcements, Wedding Invitations, Etc
- Italian Restaurants, Holyoke
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