Placenticeras meeki is an ammonite species from the Late Cretaceous.

Shells of this species could reach a diameter of about 20 to 50 centimetres (7.9 to 19.7 in), although largest specimen could reach 1 metre (3 ft 3 in).

Whorls are stout and rounded to diameter of 3 millimeters.

The surface of fossils is usually covered by opalized nacre (ammolite).

The name honours American Palaeontologist Fielding Bradford Meek.