- Fabric Stores, Torrington
- Family Crisis Services, Torrington
- Family Services & Care, Torrington
- Farm & Agricultural Equipment, Torrington
- Farm & Ranch Management Services, Torrington - Farm Labor
- Farm Equipment, Torrington
- Farm Equipment Wholesale, Torrington
- Farms, Torrington
- Fast Food Restaurants, Torrington
- Fasteners & Miscellaneous Hardware Companies, Torrington - Wholesale, Manufacturers & Suppliers
- Federal Administrative Agencies, Torrington
- Federal Economic And Regulatory Agencies, Torrington
- Federal Government, Torrington
- Finance, Torrington
- Financial Advisory Services, Torrington
- Financial Institutions, Torrington
- Financial Management & Consulting, Torrington
- Financial Planning Consultants, Torrington
- Financial Services, Torrington
- Fire & Water Damage Restoration, Torrington - Cleanup & Repair Service
- Fire Department, Torrington
- Fire, Marine & Casualty Insurance, Torrington
- Firearms & Ammunition, Torrington
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- Fireworks Retail, Torrington
- Flatbed & Cargo Trailers, Torrington - New & Used Trailer, Parts & Dealers
- Flight Instruction Schools, Torrington
- Flooring Materials & Supplies, Torrington - Flooring Companies & Stores
- Flooring Stores & Dealers, Torrington - Carpet Rugs, Hardwood Flooring, Laminate Flooring, Ceramic Tile, Vinyl Flooring, Area Rugs & More
- Florists, Torrington - Flower Shops
- Flowers & Plants, Torrington
- Food & Beverage Stores & Services, Torrington
- Food & Beverages - Wholesale & Retail, Torrington
- Food Processing Manufacturers, Torrington
- Food Product Manufacturers, Torrington
- Food Production Machinery - Manufacturers, Torrington
- Foundations, Clubs, Associations, Etcetera, Torrington
- Fraternal Organizations, Torrington
- Frozen Food Locker Plants, Torrington
- Fruit & Vegetable Markets, Wholesale & Retail, Torrington
- Fuel, Torrington
- Fuel Bulk Delivery Services, Torrington
- Fuel Dealers & Gas Stations, Torrington
- Full Service Breakfast Restaurants, Torrington
- Funeral Services, Crematory & Cemetery, Torrington - Funeral Homes & Directors
- Funeral Supplies, Torrington
- Furniture Stores, Torrington
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