153 Hilda is an very large asteroid orbiting in outermost Main belt. Because it is composed of primitive carbonates, it has dark-colored surface.

Hilda gives its name to an asteroid group called Hilda asteroids (or shorter Hildas). It is not an asteroid family since the members are not physically related. Instead they are asteroids locked in a 2:3 orbital resonance with Jupiter.

It was discovered by J. Palisa on November 2, 1875.

Hilda was observed to occult a star on the last day of 2002 from Japan.

It has a very flat lightcurve indicating a spherical body.