NGC 3943 is a barred lenticular galaxy, located 304 million light-years away in the Leo constellation. It was discovered on April 27, 1865, by astronomer Heinrich d'Arrest. NGC 3943 is a LINER galaxy, and is a member of the NGC 3937 Group.
NGC 3943 has a supermassive black hole with an estimated mass of 2.4 à10<sup>8</sup> <var>M</var><sub>âÂÂ</sub>.