Antoon Stillemans (10 December 1832, Sint-Niklaas – 5 November 1916, Ghent) was for 26 years the twenty-fourth bishop of Ghent, in Belgium.
Stillemans began studies at the St.
Joseph Minor Seminary of Sint-Niklaas in 1846.
In 1853 he studied at the major seminary in Ghent.
in 1860 he earned a doctoral degree in philosophy at Leuven.
Stillemans' brother, Pierre-Louis Stillemans, also became a priest.