The Twenty-third Amendment may refer to the:

• Twenty-third Amendment of the Constitution of India, 1969 amendment relating to reserved seats in the parliament, including the abolition of tribal reservation for Nagaland
• Twenty-third Amendment of the Constitution of Ireland, which permitted the state to recognise the International Criminal Court
• Twenty-third Amendment to the Constitution of Pakistan, which granted legal cover to military courts
• Twenty-third Amendment to the United States Constitution, which allowed residents of the District of Columbia to vote in presidential elections

This disambiguation page lists articles associated with the title Twenty-third Amendment.
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