- Ice Cream & Frozen Yogurt, North Andover
- Incinerator Parts & Supplies, North Andover
- Individual & Family Information & Referral Services, North Andover
- Industrial & Commercial Cleaning Services & Companies, North Andover
- Industrial & Commercial Real Estate, North Andover
- Industrial Contractors, North Andover
- Industrial Equipment & Machinery, North Andover
- Industrial Equipment & Systems, North Andover
- Industrial Filters, North Andover
- Industrial Goods & Products - Hard Goods - Large, North Andover
- Industrial Goods & Products - Hard Goods - Small, North Andover
- Industrial Goods & Products - Soft - Large & Small, North Andover
- Industrial Machinery Supplies & Equipment - Leasing & Rental, North Andover
- Industrial Waste Disposal, North Andover
- Industrial Waste Recycling, North Andover
- Industry, North Andover
- Information Bureaus & Services, North Andover
- Information Technology Services, North Andover - IT Service
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- Insulation Contractors, North Andover - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
- Insurance Adjusters, North Andover
- Insurance Adjusters Public, North Andover
- Insurance Brokers, North Andover
- Insurance Carriers, North Andover
- Insurance General Liability, North Andover
- Insurance Motorcycles, North Andover
- Insurance Renters, North Andover
- Insurance Services, North Andover
- Interior Designers, North Andover
- Interior Designers & Decorators, North Andover
- Internal Medicine Doctors, North Andover - Internists Physicians & Surgeons
- Internet Marketing & Advertising Services, North Andover
- Internet Providers, North Andover
- Internet Services, North Andover
- Investment Management Services, North Andover
- Investment Services & Advisors, North Andover
- Italian Restaurants, North Andover
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