| Health Clubs | 215 |
| Health Education | 215 |
| Health Information & Referral Programs | 216 |
| Health Maintenance Organizations | 216 |
| Hearing Aids | 216 |
| Hearing Aids-Parts & Repairing | 216 |
| Heat Pumps | 216 |
| Heat Recovery Equipment & Systems | 216 |
| Heating Contractors | 217 |
| Heating Equipment | 218 |
| Heating Equipment & Systems- Cleaning & | 219 |
| Repairing |
| Helicopter Charter & Rental Service | 219 |
| Herbs | 219 |
| Highway Patrol | 219 |
| Historic Restoration Consultants | 219 |
| Historical Places | 219 |
| Historical Preservation & Restoration Services | 219 |
| Hobby & Model Shops | 219 |
| Hockey Clubs | 220 |
| Home Builders | 220 |
| Home Designing & Planning Service | 220 |
| Home Furnishings | 220 |
| Home Health Care Equipment & Supplies | 220 |
| Home Health Services | 220 |
| Home Improvements | 221 |
| Home Inspection Service | 224 |
| Home Planning Service | 225 |
| Home Repairs & Maintenance Services | 225 |
| Home Theatre Systems | 225 |
| Homes Or Institutions | 225 |
| Homes-Children | 225 |
| Homestead Associations | 225 |
| Horse Breeders | 225 |
| Horse Dealers | 225 |
| Hose Couplings & Fittings | 225 |
| Hosiery | 225 |
| Hospices | 225 |
| Hospital Equipment & Supplies | 227 |
| Hospital Equipment & Supplies-Renting | 227 |
| Hospital Equipment-Maintenance & Service | 227 |
| Hospitals | 227 |
| Hostels | 235 |
| Hot Shot Service | 236 |
| Hotels | 236 |
| House & Building Movers | 240 |
| House Cleaning | 240 |
| House Leveling | 241 |
| House Washing-Exterior | 241 |
| Housewares | 241 |
| Housing Assistance | 241 |
| Housing Authorities | 241 |
| Human Resources | 241 |
| Humane Societies | 241 |
| Hunting & Fishing Licenses | 243 |
| Hydraulic Equipment & Supplies | 243 |
| Hypnotherapists | 243 |
| Hypnotists | 243 |
| I |
| Ice | 243 |