NGC 3929 is an elliptical or a lenticular galaxy located 330 million light-years away in the Leo constellation. It was discovered on December 4, 1861, by astronomer Heinrich d'Arrest. NGC 3929 is a member of the NGC 3937 Group.
NGC 3929 has a supermassive black hole with an estimated mass of 5.5 à10<sup>8</sup> <var>M</var><sub>âÂÂ</sub>.