Bogusław Leszczyński, count of Leszno (1614–1659) from the Leszczyński Family of Holy Roman Empire counts, was a Polish noble (szlachcic) and politician from Wielkopolska region. Traveled abroad from 1632-1636 with his tutor John Jonston, studied under Comenius. Bogusław held the following official positions: * General Starost of Greater Poland in 1642 * Grand Treasurer of the Crown in 1650 * Deputy Chancellor of the Crown in 1658 * Starost of Bydgoszcz, Sambor, Międzyrzecz, Ostrów, Człuchów and Osiek. Bogusław held the following Sejm positions in Warsaw: