Leontoceryx is an extinct, little-known genus of pantherine felid.

It was named in 1938 by Hungarian palaeontologist Miklós Kretzoi based on a partial upper jaw fossil with only three teeth present.

[1] The holotype specimen was originally described in 1916 and assigned to Machairodus schlosseri by Alexejew,[2] though Otto Zdansky in 1924 expressed doubt as to that identification based on Alexejew's illustration, which lacked the chin ridge seen in M. schlosseri and did have a groove on the canine tooth characteristic of felines.

It came from a locality near Csákvár, Hungary, and was dated back to the Late Miocene.

[4] This article related to prehistoric animals from order Carnivora is a stub.