Anton Wilhelm Ertl (10 September 1654, Munich – c.1715) was a German lawyer and geographer.
He studied law at Ingolstadt, and from around 1680, worked as a lawyer in the Munich court.
He also served as a judge in the jurisdictions of various monasteries in Bavaria (from 1682).
In 1705 he received the title of imperial counsellor and was a lawyer of the imperial equestrian order in Suebia.He was the author of:
Austriana Regina Arabiae (1688): A novel Ertl dedicated to Prince Joseph I (1678–1711).
Chur-bayerischer Atlas (1687): An atlas with descriptions of Bavarian places of interest of which a short story accompanies engravings of the pertinent locations (engravings by Johann Ulrich Kraus).
Relationes Curiosae Bavaricae (1685): A collection of anecdotes and character portrayals derived from Bavarian history.