Neocardioceras is a genus of evolute acanthoceratid ammonites from the uppermost Cenomanian, Upper Cretaceous, of Europe, western U.S. and Brazil.

As described in Cobban, Hook & Kenneday, 1989, Neocardioceras is a fairly small, moderately evolute, generally compressed ammonite that has prominent and very numerous rectoradiate to prorsiradate ribs and umbilical, inner and outer, and siphonal (mid ventral) tubercles.

Neocardioceras was proposed by Spath, 1926, for ammonites "resembling Prionocyclus Meek, except for the Quenstedtoceras keel".

Wright, 1957, subsequently described Neocardioceras as evolute, compressed, with sharp umbilical and double ventrolateral tubercles (inner and outer per side) and a row of close round siphonal (mid ventral) tubercles that tend to form a nodose keel (Questedtoceras comparison of Spath).

Sharper ribs, a more fastigate (gable roof) venter, and much closer siphonal tubercles help distinguish Neocardioceras from the otherwise similar Protcardioceras.