Treaty Ports

Sovereign base areas of the ‌United Kingdom
Ulster banner
Flag of the Lord Lieutenant of Ireland
1922–1938 Flag of Ireland
Naval Ensign of the United Kingdom Coat of Arms of the United Kingdom
Status Sovereign base areas
- 1922-1936George V
- 1936Edward VIII
- 1936-1938George VI
First Sea Lord
- 1922-1927Earl Beatty
- 1927-1930Sir Charles Madden, Bt
- 1930-1933Sir Frederick Field
- 1933-1938Lord Chatfield
December 6, 1921 Anglo-Irish Treaty
December 6, 1922Establishment of the Irish Free State
December 8, 1922Northern Ireland leaves the Free State
July 3, 1938Spike Island Handover
September 30, 1938Berehaven Handover
October 3, 1938Lough Swilly Handover
September 1, 1939World War II
Ulster banner Northern Ireland
Flag of the Lord Lieutenant of Ireland Southern Ireland
Ireland Flag of Ireland

The Treaty Ports were three harbour installations retained by the United Kingdom as military bases and sovereign territory after the establishment of the Irish Free State on December 6, 1922. These were located in Lough Swilly, Berehaven and Queenstown, today known as Cobh. The were also provisions for Belfast Lough to remain under British control, but as Northern Ireland exercised its right to opt out the Irish Free State on December 8, 1922 the entire territory remained within the United Kingdom.

In 1938 control over the Treaty Ports were handed over to Ireland and they ceased to be British territory.

Events Edit

  • Anglo-Irish Treaty (December 6, 1921)
  • Establishment of the Irish Free State (December 6, 1922)
  • Northern Ireland leaves the Free State (December 8, 1922)
  • Spike Island Handover (July 3, 1938)
  • Berehaven Handover (September 30, 1938)
  • Lough Swilly Handover (October 3, 1938)
  • World War II (September 1, 1939)


British Polities in Ireland