Leading from College Green to O'Connell street and named after John Fane, tenth Earl of Westmoreland and Lord Lieutenant 1790-94. One of the last streets to be laid out by the Wide Streets Commissioners, Westmoreland Street is part of a set piece design with D'Olier Street.
| Year | Architect | Building |
| 1867-70 | William G. Murray | Amusement City |
| 1886 | G.C. Ashlin | No.7 |
| 1935 | Millar & Symes | Offices |