Two referendums were held together in Ireland on 7 December 1972, each on a proposed amendment of the Irish constitution. Both proposals were approved by voters.
Main article: Fourth Amendment of the Constitution of Ireland
The Fourth Amendment to the constitution lowered the voting age for all national elections and referendums in the state from twenty-one to eighteen years of age
|Invalid or blank votes||47,089||5.21|
|Registered voters and turnout||1,783,604||50.65|
Main article: Fifth Amendment of the Constitution of Ireland
The Fifth Amendment to the constitution removed reference to "special position" of the Roman Catholic Church and to certain other named denominations.
|Invalid or blank votes||49,326||5.46|
|Registered voters and turnout||1,783,604||50.67|