Karl Hecker (8 May 1827 – 14 December 1882) was a German gynecologist and obstetrician born in Berlin.
In 1851 he became an assistant at the clinic of obstetrics at the Berlin-Charité under Dietrich Wilhelm Heinrich Busch (1788–1858).
Here he gained his habilitation in 1853 with a thesis involving retroverted gravid uterus (De retroversione uteri gravidi).
At Munich he was also director of the municipal district maternity hospital and school for midwives.
From 1877 he worked with Carl Siegmund Franz Credé (1819–1892) and Alfred Hegar (1830–1914) for the creation of an independent gynecological society, but it wasn't until 1885, three years after his death, when the Deutsche Gesellschaft für Gynäkologie was established.