- Radio & Tv Communications Equipment Manufacturers, Locust Valley
- Real Estate, Locust Valley - Agent, Broker & Companies
- Real Estate Developers, Locust Valley
- Real Estate Services, Locust Valley
- Recording Studio - Equipment & Rental, Locust Valley
- Recreational Organizations, Locust Valley
- Reformed Churches, Locust Valley
- Religious Organizations, Locust Valley
- Repair Services, Locust Valley
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- Reprographic Services, Locust Valley
- Residential Care Facilities, Locust Valley
- Residential Construction Contractors, Locust Valley - General Contractors
- Restaurants/Food & Dining, Locust Valley
- Retaining Wall Contractors, Locust Valley - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement Communities & Home, Assisted Living & Apartments, Locust Valley
- Roofing Consultants, Locust Valley - Roofing Companies
- Roofing Contractors, Locust Valley - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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