The Electoral (Amendment) Act 1961 (No. 19) was a law in Ireland which revised Dáil constituencies. The new constituencies were first used at the 1961 general election to the 17th Dáil held on 4 October 1961. This Act replaced the Electoral (Amendment) Act 1947, which had defined constituencies since the 1948 general election. It was repealed by the Electoral (Amendment) Act 1969, which created a new schedule of constituencies first used at the 1969 general election to the 19th Dáil.