The vice-president of the Executive Council (Irish: Leas-Uachtarán na hArd-Chomhairle) was the deputy prime minister of the 1922–1937 Irish Free State, and the second most senior member of the Executive Council (cabinet).

Formally the vice-president was appointed by the Governor-General on the nomination of the president of the Executive Council, but by convention the Governor-General could not refuse to appoint a vice-president whom the president had selected.

Under Article 53 of the Free State constitution the role of the vice president was to "act for all purposes in the place of the President", until the appointment of a successor in the event of his death, resignation or "permanent incapacity", or until his return in the event of his "temporary absence".

However, in practice the vice president also held a second ministerial portfolio, whose duties he carried out when not called upon to become acting head of government.

In 1937, when the new Constitution of Ireland came into force, the office of Vice-President of the Executive Council was replaced with that of Tánaiste.