The Isle of Man Act 1958 (6 & 7 Eliz. 2. c. 11) was an act of the Parliament of the United Kingdom that restated the Common Purse Agreement between the United Kingdom and the Isle of Man.
It also ended control by the UK Treasury over Manx finances, and granted Tynwald powers to legislate with regard to customs, harbours, loans, mines, the police and the civil service.
Section 1 of the act repealed 17 enactments, listed in parts I, II and III of the schedule to the act.
The whole act was repealed by section 14(5) of, and schedule 2 to, the Isle of Man Act 1979 (c. 58), which came into force on 1 April 1980.