| PARISH NAME | YEARS | Prefix (X) 11 | Parish No. | Suffix (X) | COUNTY |
| Udny | 1855-1869 | (B,C,M) 11 | 249/ | 1 - 9 | Aberdeen |
| Udny | 1870-1955 | (B,C,M) 11 | 249A | 1 - 9 | Aberdeen |
| Uig | (B,C,M) 11 | 089/ | 1 - 9 | Ross & Cromarty | |
| Uist, North | (B,C,M) 11 | 113/ | 1 - 9 | Inverness | |
| Ulva | 1890-1955 | (B,C,M) 11 | 544/1 | 1 - 9 | Argyll |
| Unst | (B,C,M) 11 | 011/ | 1 - 9 | Shetland | |
| Uphall (Strathbrock) | (B,C,M) 11 | 672/ | 1 - 9 | West Lothian (Linlithgow) | |
| Urquhart | (B,C,M) 11 | 107/ | 1 - 9 | Inverness | |
| Urquhart | 1855-1889 | (B,C,M) 11 | 144/ | 1 - 9 | Elgin/Moray |
| Urquhart & Logie Water | (B,C,M) 11 | 084/ | 1 - 9 | Ross & Cromarty | |
| Urr | (B,C,M) 11 | 884/ | 1 - 9 | Kirkcudbright | |
| Urray | (B,C,M) 11 | 085/ | 1 - 9 | Ross & Cromarty |