Maximilian Karl Joseph Franz de Paula Hieronymus de Garnerin de la Thuille, Count von Montgelas (German: Maximilian Karl Joseph Franz de Paula Hieronymus de Garnerin de la Thuille Graf von Montgelas; 12 September 1759 Munich – 14 June 1838 Munich) was a Bavarian statesman, a member of a noble family from the Duchy of Savoy.
His father John Sigmund Garnerin, Baron Montgelas (German: Janus Sigmund Garnerin Freiherr von Montgelas), entered the military service of Maximilian III, Elector of Bavaria, and married the Countess Ursula von Trauner.
Maximilian Josef, their eldest son, was born in the Bavarian capital Munich on September 10, 1759.