Count Franciszek Maksymilian Ossoliński (2 April 1676 – 1 July 1756) was a Polish nobleman, politician, diplomat and a patron of arts.

He was starost (a crown district administrator) of Sandomierz, Nur, Ostrów, Drohiczyn, Chmielnik and Niepołomice.

His political and military career began at the end of the 17th century under patronage of Stanisław Antoni Szczuka.

In 1733 he signed the election of Stanisław I as King of Poland and commanded armed forces in the defence of the monarch.

He refused to submit to King Augustus III and after 1736 he stayed at the court of Stanisław I Leszczyński in the Palace of Lunéville in Lorraine.