- Family Medicine & General Practice Doctors, Poolesville - General Practitioner (GP), Physicians & Surgeons
- Family Services & Care, Poolesville
- Farm Equipment, Poolesville
- Farms, Poolesville
- Federal Government, Poolesville
- Fencing - Fence Supplies & Materials, Poolesville - Fence Companies
- Finance, Poolesville
- Financial Institutions, Poolesville
- Financial Planning Consultants, Poolesville
- Financial Services, Poolesville
- Fitness, Poolesville
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- Fitness Centers, Poolesville
- Florists, Poolesville - Flower Shops
- Flowers & Plants, Poolesville
- Food & Beverage Stores & Services, Poolesville
- Food Delivery Services, Poolesville
- Food Services, Poolesville
- Foundations, Clubs, Associations, Etcetera, Poolesville
- Fraternal Organizations, Poolesville
- Fruit & Vegetable Growers, Poolesville
- Fruit Shippers, Poolesville
- Functions Related To Deposit Banking, Poolesville
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