Alphonse Marie Louis de Prat de Lamartine (French: [alfɔ̃s maʁi lwi də pʁa d(ə) lamaʁtin]; 21 October 1790 – 28 February 1869) was a French author, poet, and statesman. Initially a moderate royalist, he became one of the leading critics of the July Monarchy of Louis-Philippe, aligning more with the Republican Left and Social Catholicism.

Lamartine was a leading figure in the 1848 French Revolution and was instrumental in the foundation of the Second Republic along with the preservation of the tricolor as the flag of France. During the revolutionary year of 1848 he served as Foreign Minister and frequently worked to ease tensions between the government and the working class. He was a candidate in the 1848 French presidential election but lost to Louis Napoleon Bonaparte. After the election, he retired from political life.