List of Famous people named Leszek

Leszek the White was Prince of Sandomierz and High Duke of Poland during 1194–1198, 1199, 1206–1210, and 1211–1227. During the early stages of his reign, his uncle Duke Mieszko III the Old and cousin Władysław III Spindleshanks, from the Greater Polish branch of the royal Piast dynasty, contested Leszek's right to be High Duke.

Leszek II the Black, was a Polish prince of the House of Piast, Duke of Sieradz since 1261, Duke of Łęczyca since 1267, Duke of Inowrocław during 1273-1278, Duke of Sandomierz and High Duke of Poland since 1279.

Leszek of Racibórz was a Duke of Racibórz since 1306 and Duke of Koźle from 1334 until his death.

Leszek Kołakowski was a Polish philosopher and historian of ideas.

Leszek Zadlo is a Polish jazz musician, composer, and university teacher.

Leszek of Dobrzyń, was a Polish prince member of the House of Piast and Duke of Dobrzyń during 1312-1316 with his brothers.

Leszek Cezary Miller is a Polish politician. He has served as a Member of the European Parliament (MEP) since July 2019.

Leszek Robert Blanik is a Polish gymnast, World and Olympic champion in vault. He was the first to perform a handspring double front vault in piked position which now has been named after him.

Leszek of Masovia was a Polish prince from the Piast dynasty, the Duke of Masovia from 1173 until his death. He was the only son of Bolesław IV the Curly, Duke of Masovia and High Prince of Poland, to survive his father. After his father's death he inherited Masovia. At the beginning, Leszek ruled under the guardianship of his uncle Casimir II the Just. He was a man of poor health. For a short time he supported his other uncle, Mieszko III the Old, but later decided to reconcile with Casimir II, who after Leszek's death inherited his duchy.

Leszek of Inowrocław, was a Polish prince member of the House of Piast. He was Duke of Inowrocław from 1287 to 1314, Duke of Pomerelia in 1296, and ruler over Wyszogród from 1296. In he 1300 paid homage to King Wenceslaus II of Bohemia, in 1303 sold to the Teutonic Order the Michałów Land, during 1303-1312 in captivity in Bohemia, since 1312 vassal of the Kingdom of Poland, during 1314-1320/24 sole ruler over Inowrocław, abdicated.