- Hair Care Professionals, Holliston
- Hardware Brackets, Holliston
- Hardware Stores, Holliston
- Harness, Saddles & Supplies, Holliston
- Health & Medical, Holliston
- Health And Medical Centers, Holliston
- Health Care Information & Services, Holliston
- Healthcare Consultants, Holliston
- Healthcare Providers, Practitioners & Professionals, Holliston
- Heating & Air-Conditioning Contractors, Holliston - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating & Plumbing Supplies Stores, Holliston
- Heating Contractors, Holliston - Heating Systems - Installation & Repair
- Highway Surfacing & Paving Contractors, Holliston - Pavers - Paving Companies
- Historical Organizations, Holliston
- Historical Societies, Holliston
- Holistic Health Practitioner, Holliston - Holistic Medicine
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- Home Additions & Remodeling Contractors, Holliston - Refinishing & Restoration
- Home Decor Stores, Holliston - Home Decorations, Supplies & Accessories
- Home Furnishings, Holliston - Home Decor Stores, Items & Accessories
- Homeowners Insurance, Holliston
- Horse Stables, Holliston
- Horseback Riding Lessons & Instruction, Holliston - Horse Riding School
- Hospital, Dental & Medical Equipment & Supplies, Holliston
- Hospitals, Holliston
- Hot Water Heater Installation & Repair, Holliston - Gas & Electric Water Heater Services
- Hotels & Motels, Holliston
- House & Building Washing & Maintenance Exterior, Holliston
- Household & Commercial Appliances Stores, Holliston
- Household Goods & Furniture Storage , Holliston
- Household Safety & Protective Merchandise, Holliston
- Housing Authority, Holliston
- Human Resource Management , Holliston
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