- Family Services & Care, Guerneville
- Fax Service, Guerneville
- Federal Government, Guerneville
- Finance, Guerneville
- Financial Institutions, Guerneville
- Financial Planning Consultants, Guerneville
- Fine Dining Restaurants, Guerneville
- Fire Department, Guerneville
- Fishing Tackle, Equipment & Supplies Stores, Guerneville - Lures, Rods, Reels, Baits, Poles & Fishing Gear
- Fitness, Guerneville
- Fitness Centers, Guerneville
- Flatbed & Cargo Trailers, Guerneville - New & Used Trailer, Parts & Dealers
- Flowers & Plants, Guerneville
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- Flowers, Plants & Trees - Silk, Dried, Etc - Retail & Supplies, Guerneville
- Food & Beverage Stores & Services, Guerneville
- Food Product Manufacturers, Guerneville
- Foreign Auto Repair & Service, Guerneville
- Foundations, Clubs, Associations, Etcetera, Guerneville
- Fraternal Organizations, Guerneville
- Fuel, Guerneville
- Furniture Covers, Guerneville
- Furniture Design, Guerneville
- Furniture Repair, Guerneville
- Furniture Reupholstery & Repair, Guerneville
- Furniture Stores, Guerneville
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