Conus ngavianus (FOSSIL) Martin, 1895 †
Conus ngocngai Thach, 2017
Phasmoconus niederhoeferi E. Monnier, L. Limpalaër& F.Jr. Lorenz, 2012
Kioconus nielsenae (J.A. Marsh, 1962)
Pionoconus nigromaculatus (D. Röckel& R.G. Moolenbeek, 1992)
Pionoconus nigropunctatus (G.B. II Sowerby, 1858)
Conus nimbosus Bozzetti, 2017
Conus nimbosus nanoclarus L. Bozzetti, 2017
Nimboconus nimbosus (C.H. Hwassin J.G. Bruguière, 1792)
Conus nisus (FOSSIL) Orbigny, 1852 †
Conus niveus J.F. Gmelin, 1791
Eugeniconus nobilis (C. Linnaeus, 1758)
Eugeniconus nobilis renateae J.C. Cailliez, 1993
Eugeniconus nobilis skinneri (A.J. Da Motta, 1982)
Eugeniconus nobilis victor (W.J. Broderip, 1842)
Varioconus nobrei (H. Trovão, 1975)
Lithoconus nocens (FOSSIL) Garvie, 1996 †
Conus nocturnus J. Lightfoot, 1786
Cylinder nodulosus (G.B. II Sowerby, 1865)
Conus noe (FOSSIL) Brocchi, 1814 †
Isoconus nucleus (L.A. Reeve, 1848)
Hermes nussatella (C. Linnaeus, 1758)
Harmoniconus nux (W.J. Broderip, 1833)
Gradiconus nybakkeni M.J. Tenorio, J.K. Tucker& A. Chaney, 2012
Conus oboesus (FOSSIL) Michelotti, 1847 †
Protostrioconus obscurus (G.B. II Sowerby, 1833)
Graphiconus ochroleucus (J.F. Gmelin, 1791)
Graphiconus ochroleucus tmetus (J.R. le B. Tomlin, 1937)
Lithoconus odengensis (FOSSIL) K. Martin, 1895 †
Conasprella ogum (E.J. Petuch & B.W. Myers,2014)
Conus oinouyei (FOSSIL) Yokoyama, 1928 †
Graphiconus oishii (T. Shikama, 1977)
Conus okhotensis (FOSSIL) Dall, 1893 †
Conus olangoensis Poppe & Tagaro, 2017
Conus olea J.S. Schröter, 1803