Alexandre-Félix-Joseph Ribot (French pronunciation: [alɛksɑ̃dʁ ʁibo]; 7 February 1842 – 13 January 1923) was a French politician, four times Prime Minister.

Ribot was born in Saint-Omer, Pas-de-Calais. After a brilliant academic career at the University of Paris, where he was lauréat of the faculty of law, he rapidly made his mark at the bar. He was secretary of the conference of advocates and one of the founders of the Sociéte de legislation comparée. During 1875 and 1876 he was successively director of criminal affairs and secretary-general at the ministry of justice. In 1877 he entered politics, playing a conspicuous part on the committee of legal resistance during the Brogue ministry; in the following year he was returned to the chamber as a moderate republican member for Boulogne, in his native département of Pas-de-Calais.

His impassioned yet reasoned eloquence gave him an influence which was increased by his articles in the Parlement in which he opposed violent measures against the unauthorized congregations. He devoted himself especially to financial questions, and in 1882 was reporter of the budget. He became one of the most prominent republican opponents of the Radical party, distinguishing himself by his attacks on the short-lived Gambetta ministry. He refused to vote the credits demanded by the Ferry cabinet for the Tongking expedition, and helped Georges Clemenceau overthrow the ministry in 1885. At the general election of that year he was a victim of the Republican rout in the Pas-de-Calais, and did not re-enter the chamber till 1887.