Franciszek Ksawery Niesiołowski (18 December 1771 – 15 September 1845) was a colonel in the 6th Lithuanian Foot Regiment, general in the Kościuszko Uprising, the Army of the Duchy of Warsaw, and the Army of the Kingdom of Poland, served during the November Uprising, became a member of the Sejm in 1830, and was Senator-Castellan of the Kingdom of Poland from 8 August 1831.