Titanoceras is an extinct genus in the nautiloid order Nautilida from the Pennsylvanian and Lower Permian of North America and Western Australia.

Titanoceras grew to be fairly large, with a tightly spiraled shell that reached a diameter of about 8 in (20 cm +) with about three volutions.

The inner coils are partially enveloped by the next outer, resulting in a channel or impression along the inner rim, the dorsum.

Whorls have a somewhat rectangular cross section that is wider than high; in contrast with the otherwise similar and contemporary Domatoceras.

Sutures have shallow lobes along the sides and across the venter and short saddles in between, along the ventro-lateral shoulders, but go straight across the dorsum.