- U-Haul Truck Rental, Jacksonville - U-Haul Moving
- U-Haul Trucks, Jacksonville - Uhaul Truck Rental
- U.S. Postal Service, Jacksonville
- Ultrasound Services, Jacksonville
- Underground Utility Locating Service, Jacksonville
- Uniforms, Work Clothes & Safety Clothing, Jacksonville
- Uninterruptible Power Supplies Systems, Jacksonville
- Unity Church, Jacksonville
- Urologists, Jacksonville - Urology Doctors, Physicians & Surgeons
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- Used Appliances, Jacksonville
- Used Book Stores, Jacksonville - New & Rare Books
- Used Cars, Truck, Van & SUV Car Dealerships, Jacksonville
- Used Furniture Stores, Jacksonville - Used Office, Patio, Hotel, Baby & Bedroom Furniture Dealers
- Used Merchandise, Resale Shops & Thrift Stores, Jacksonville
- Utilities, Jacksonville
- Utilities Contractors, Jacksonville
- Utility & Waste Management Services, Jacksonville
- Utility Installation Contractors, Jacksonville
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