Jakob Heilmann (21 August 1846 in Geiselbach, Aschaffenburg County (Lower Franconia) – 15 February 1927 in Munich) was a German contractor.
Son of a glazier, Heilmann attended the construction school in Munich and graduated with the exam as a master builder.
Magnificent and monumental buildings included the Schackgalerie, the Prinzregententheater, Münchener Neueste Nachrichten, Hofbräuhaus-rebuilding in Munich and several health resort hotels in other parts of Bavaria.
After the partners Littmann and Richard Reverdy left in 1908 und 1909, his sons Albert and Otto joined the construction company..
Furthermore, Jakob Heilmann initiated the founding of the electric power provider Isarwerke GmbH.