| Date | | | |
| 1-May-1925 | | Royal Dublin Society's offices removed from Leinster House to premises at Ballsbridge. During the year many of the principal streets were relaid with asphalte, concrete and wood blocks in place of stone setts. The Tramway Company and several private companies started services of Motor Buses between the city and- outlying districts, and Taxi Cars were licensed to ply for hire in the city. There were many strikes, which handicapped trade and industry, the most serious of which took place in the coal trade. | |
| 18-Apr-1926 | | Census of the Population of Dublin taken Number of inhabitants within the Municipal area, 316,471. | |
| 10-Jul-1927 | | Mr. Kevin O'Higgins, Minister for Justice and Vice-President of the Executive Council, assassinated at Booterstown-avenue. Co. Dublin. | |
| 13-Jul-1927 | | Public Funeral of Mr. Kevin O'Higgins. | |
| 11-Aug-1927 | | Mr. E. de Valera and Party take the Treaty Oath. They enter the Dail and take their seats. | |
| 9-Sep-1927 | 17 | Civic week held for First time in Dublin. | |
| 2-Dec-1927 | | Second Free State Loan floated for £7,089,175, and was oversubscribed. $4,006,925 in the Irish Free State and £3,082,250 or $15,000,000 dollars in America. | |
| 15-Dec-1927 | | Mr. James MacNeill, High Commissioner in London appointed Governor-General of the Irish Free State on retirement of His Excellency Timothy Michael Healy. | |
| 1-Feb-1928 | | James MacNeill sworn in as Governor-General of the Irish Free State before the Chief Justice. | |
| 11-Aug-1928 | | The Second Aonach Tailteann opened at Croke Park. The games and contests continued until the 27th. | |