Michel Poniatowski (16 May 1922 – 15 January 2002) was a French politician, member of a legitimized line of Poland's princely Poniatowski family. He was a founder of the Independent Republicans and a part of the administration for President Valéry Giscard d'Estaing. Poniatowski served as Minister of Health from 1973 to 1974 and Minister of the Interior in the Giscard d'Estaing government from 1974 to 1977. He was a founder and honorary president of the Union for French Democracy (Union pour la Démocratie Française, UDF).

Poniatowski was the 7th great-grandson of Prince Kazimierz Poniatowski, older brother of Stanisław August Poniatowski, who reigned as king of Poland from 1764 to 1795. Kasimierz had a son, Stanisław Poniatowski 1754–1833, whose son, Giuseppe Luci (1816–1873), by his mistress Cassandra Luci, was recognized and ennobled in the Austrian Empire on 19 November 1850 as Joseph Michel, Prince Poniatowski, a name and title recognised by Napoleon III when Poniatowski was naturalised in France and became a senator there, both in 1854. Two years later in Paris, Joseph's son, Prince Stanislas Poniatowski (1835–1908), married Louise Le Hon, generally reputed to be the daughter of Countess Le Hon (née Fanny Mosselman) by Charles, Duke de Morny, the illegitimate son of Charles Joseph, comte de Flahaut by Hortense de Beauharnais, sometime Queen consort of Holland as well as the adopted and step-daughter of Napoleon I; thus Louise Le Hon (as a granddaughter of Napoleon III's uterine half-brother) was a niece of the Emperor of France at the time of her marriage to Poniatowski, who was appointed the emperor's aide-de-camp. Their son, André Poniatowski (1864–1954) wed Stockton flour mill heiress Elizabeth Sperry in 1894. The son of that union, Prince Casimir Poniatowski (1897–1980), became the father of Michel by his 1920 marriage to Countess Anne de Caraman-Chimay (1901–1977), member of a Belgian princely family.

Poniatowski attended the Cours Hattemer, a private school. He attended the École nationale d'administration for finance and began his career in Morocco, later becoming a finance attaché in Washington, DC in 1956. In 1958, he became the chief of staff for Pierre Pflimlin, the last president of the Council of the Fourth Republic before Charles de Gaulle. From 1959 to 1962, he was the chief of staff for prime minister Valéry Giscard d'Estaing, then chargé de mission (1962–1865), and finally director of Insurances at the Minister of Finance from 1963 to 1967.

Poniatowski took a founding part in the Independent Republicans (RI) party, and became an RI deputy for the Val-d'Oise in 1967, as well as the general secretary of the Confederation of the Independents before taking the presidency of the party's successor, the Republican Party, in 1975. He was elected mayor of L'Isle-Adam (France) in 1971. Bernard Lehideux served Poniatowski as of his office in 1969. Poniatowski was then named Minister of Public Health and Social Security from 5 April 1973 to 27 May 1974, under the government of Pierre Messmer. ...

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