Wilhelm Jakob Hertling (16 December 1849, Katzenelnbogen - 8 October 1926, Munich) was a German landscape and genre painter.
In 1875, he went to live in the artists' colony at Kronberg im Taunus, where he continued his studies with Adolf Schreyer and Anton Burger until 1879.
In either 1882 or 1884, he settled in Munich and joined the circle of artists associated with Adolf Heinrich Lier.
Together with Carl Strathmann, René Reinicke, Hans Wieland, Max Eduard Giese, Rudolf Köselitz, and several others, he was a co-founder of the Munich Watercolorists' Association.
His works may be seen at the Lindenau-Museum, the Staatliche Graphische Sammlung München, the Städtische Galerie im Lenbachhaus and the Neue Pinakothek.