401 Ottilia is a large main-belt asteroid.

It was discovered by Max Wolf on March 16, 1895, in Heidelberg.

It is named after the Germanic folkloric character Ottilia.

The semi-major axis of the orbit of 401 Ottilia at 3.47 AU lies just outside the 2:1 Kirkwood gap, located at 3.27 AU.

[2] 401 Ottilia is part of the Cybele asteroid group.