- Uckfield - 43 companies
- Uddingston - 2 companies
- UK - 1 company
- Ulceby - 2 companies
- Ullapool - 1 company
- Ullesthorpe - 1 company
- Ulverston - 17 companies
- Umberleigh - 3 companies
- Upminster - 23 companies
- upon Tyne - 1 company
- Upper Beeding - 1 company
- Upper Belvedere - 1 company
- Upper Heyford - 1 company
- Upper Longdon - 1 company
- Upper Poppleton - 1 company
- Upper Sundon - 1 company
- Upper Wick Dursley - 1 company
- Upplands Väsby - 1 company
