- Fairgrounds, Trumansburg
- Family Medicine & General Practice Doctors, Trumansburg - General Practitioner (GP), Physicians & Surgeons
- Family Services & Care, Trumansburg
- Farm & Livestock Buildings, Trumansburg
- Farm Equipment, Trumansburg
- Farm Equipment Repair, Trumansburg
- Farms, Trumansburg
- Finance, Trumansburg
- Financial Institutions, Trumansburg
- Financial Planning Consultants, Trumansburg
- Financial Services, Trumansburg
- Fire, Marine & Casualty Insurance, Trumansburg
- Firewood, Trumansburg
- Fishing Tackle, Equipment & Supplies Stores, Trumansburg - Lures, Rods, Reels, Baits, Poles & Fishing Gear
- Fitness, Trumansburg
- Floor Refinishing, Installation & Resurfacing, Trumansburg - Hardwood, Laminate Flooring
- Flooring Contractors, Trumansburg - Laminate, Hardwood, Carpet, Tile, Vinyl, Linoleum, etc
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- Florists, Trumansburg - Flower Shops
- Flowers & Plants, Trumansburg
- Food & Beverage Stores & Services, Trumansburg
- Food & Beverages - Wholesale & Retail, Trumansburg
- Food Product Manufacturers, Trumansburg
- Food Services, Trumansburg
- Foundations, Clubs, Associations, Etcetera, Trumansburg
- Fraternal Organizations, Trumansburg
- Fruit & Vegetable Growers, Trumansburg
- Fruit & Vegetable Markets, Wholesale & Retail, Trumansburg
- Fruit Shippers, Trumansburg
- Fuel, Trumansburg
- Fuel Dealers & Gas Stations, Trumansburg
- Funeral Planning Services, Trumansburg
- Funeral Services, Crematory & Cemetery, Trumansburg - Funeral Homes & Directors
- Furniture Repair & Refinishing, Trumansburg
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