- Uckfield - 25 companies
- Uddingston - 1 company
- Ullesthorpe - 1 company
- Ulverston - 8 companies
- Umberleigh - 1 company
- Upminster - 11 companies
- upon Tyne - 1 company
- Upper Beeding - 1 company
- Upper Belvedere - 1 company
- Upper Heyford - 2 companies
- Upper Longdon - 1 company
- Upper Poppleton - 1 company
- Upper Wick Dursley - 1 company
- Upplands Väsby - 1 company
- Upton Upon Leves - 1 company
- Usk - 4 companies
- Utah - 1 company
- Uttoxeter - 11 companies
- Uxbridge - 51 companies
