Companies catalogue
- U-Haul, Oshawa
- U-Haul Neighborhood Dealer, Whitby
- UC Baby 3D Ultrasound, Whitby
- UCMAS, Ajax
- UCruising of Unionville, Markham
- UEI Financial, Oshawa
- UL building, UOIT North campus, Oshawa
- UNITED REFRIGERATION OF CANADA LTD., Ajax
- UOIT - Faculty of Education Building, Oshawa
- UOIT 61 Charles Street - DTA, Oshawa
- UOIT Bordessa Hall - DTB, Oshawa
- UPC, Sudbury
- UPPER THORNHILL ESTATES - VAUGHAN, Richmond Hill
- USAccess, Oshawa
- UTSC Registrar, Toronto
- Ufcw Canada, Sudbury
- Ukrainian Catholic Church of Saint George, Oshawa
- Ukrainian Credit Union Limited, Oshawa
- Ukrainian Credit Union Limited, Toronto
- Ukranian Pentecostal Church, Oshawa
- Ulatramar Gas, Whitby
- Ultimate Currency Exchange, Toronto
- Ultimate Heating & AC, Sudbury
- Umi Sushi Express, Pickering
- Ummah Foundation of Durham, Oshawa
- Unapco Automotive Machine Shop, Sudbury
- Uncle Archie's Grill Inc, Oshawa
- Undercover Kids Inc., Toronto
- Undisputed Martial Arts & Fitness, Toronto
- Uni-Toys Corporation, Richmond Hill
- Unifor (Local 222), Oshawa
- Unifor Local 1090 - Ajax, Ajax
- Unimodern, Edmonton
- Union & St John's Cemetery, Port Hope
- Union Villa Long-Term Care, Markham
- Unionville Curling Club, Markham
- Unionville High School, Markham
- Unionville Home Society Foundation, Markham
- Unionville Minor Hockey Association, Markham
- Unionville Montessori Private School, Markham
- Unionville Montessori Private School - Pre-Casa Campus, Markham
- Unionville Optometry, Markham
- Unionville Stiver Mill Community Center & Farmer's Market, Markham
- Unique Chinese School Inc, Toronto
- Unique Family Chiropractic, Ajax
- Uniserve Immigration Services, Toronto
- Unit #3, 5AXIS Dental Lab, Whitby
- Unitarian Universalist Congregation of Durham, Whitby
- Unitec Welding Alloys Ltd, Edmonton
- Unitech Ltd., Vaughan
- United Heating & Air Conditioning Inc, Blezard Valley
- United Steelworkers, Port Hope
- United Steelworkers, Toronto
- United Way, Port Perry
- United Way Durham Region, Oshawa
- United Way Of Oshawa Whitby Clarington Information Services, Oshawa
- United Way-Durham Region, Ajax
- Unity Financial Mortgage Services Inc, Richmond Hill
- Universal City Condos, Pickering
- Universal Deck Builder Scarborough, Toronto
- Universal Outreach Ministries Inc.'s, Ajax
- Universal Studios Canada, Toronto
- University of Toronto - St. George Campus, Toronto
- University of Toronto Scarborough, Toronto
- University of Toronto Scarborough Library, Toronto
- Universityof Ontario Institute of Technology, Oshawa
- Unparalleled Paint, Whitby
- Unplugged Expo - Corporate Office, Toronto
- Upper Beaches Music School, Toronto
- Upper Canada Child Care, Richmond Hill
- Upper Canada Court Reporting & Mediation Services, Richmond Hill
- Upper Canada Fuels, Oshawa
- Upper Canada Road Services, Markham
- Upper Canada Skating Club, Toronto
- Upper Thornhill Dental Care, Vaughan
- Upper Unionville Golf Club, Markham
- Upper Unionville Golf Club, Markham
- Uptown Eye Specialists - Scarborough Site, Toronto
- Uptown Health Centre, Richmond Hill
- Uptown Yonge Dental, Toronto
- Ur Computer Bytes Repair Clinic, Whitby
- Urgent Care & Walk-In Clinic at Walmart Markham Jack Nathan Health, Markham
- Urgent Care Walk-in Clinic - Port Perry, Port Perry
- Usmania Grill, Pickering
- Utica Guest House, Port Perry
- Uxbridge & District Curling Club, Uxbridge
- Uxbridge Cenotaph, Uxbridge
- Uxbridge City Hall, Uxbridge
- Uxbridge Cottage Hospital, Uxbridge
- Uxbridge Dance Academy, Uxbridge
- Uxbridge Denture Clinic, Uxbridge
- Uxbridge Farmers' Market, Uxbridge
- Uxbridge Fire Hall, Uxbridge
- Uxbridge Historical Centre Museum & Archives, Uxbridge
- Uxbridge Loaves & Fishes Food Bank, Uxbridge
- Uxbridge Orthodontic Specialists - Dr. Janice McMinn & Dr Donald Stubbs, Uxbridge
- Uxbridge Physiotherapy, Uxbridge
- Uxbridge Public Library, Uxbridge
- Uxbridge Skating Club, Uxbridge
- Uxbridge Stouffville Midwives, Uxbridge