Conus incomptus (FOSSIL) Deshayes, 1865 †
Purpuriconus inconstans (E.A. Smith, 1877)
Conus indefatigabilis (FOSSIL) Dall & Ochsner, 1928 †
Graphiconus indomaris L. Bozzetti, 2014
Lithoconus ineditus (FOSSIL) O.G. Michelotti, 1861 †
Varioconus inesae A. Monteiro, C.M.L. Afonso& al., 2014
Africonus infinitus (E. Rolán, 1990)
Cryptoconus infragradatus (FOSSIL) (A.E.M. Cossmann, 1889 †)
Sciteconus infrenatus (L.A. Reeve, 1848)
Conus infulatus (FOSSIL) R.C. Hoerle, 1976 †
Graphiconus inscriptus (L.A. Reeve, 1843)
Conasprella insculpta (L.C. Kiener, 1847)
Conus insculptus (FOSSIL) Koenen, 1890 †
Cryptoconus interpositus (FOSSIL) (G.P. Deshayes, 1865 †)
Conus interstinctus (FOSSIL) R.J.L. Guppy, 1866 †
Graphiconus iodostoma (L.A. Reeve, 1843)
Conasprella ione (H.C. Fulton, 1938)
Africonus irregularis (G.B. II Sowerby, 1858)
Africonus isabelarum (M.J. Tenorio& C.M.L. Afonso, 2004)
Conus isomatratus (FOSSIL) W.H. Dall, 1896 †
Conasprella ixchel (E.J. Petuch, D.P. Berschauer& Poremski, 2017)
Conus ixion (FOSSIL) A.V.M.D. D'Orbigny,1852 †
Purpuriconus jacarusoi E.J. Petuch, 1998
Conus jaclynae (FOSSIL) E.J. Petuch, 1994 †
Conus jacquescolombi (E. Monnier & L. Limpalaër,2016)
Conasprella janapatriceae (E.J. Petuch, D.P. Berschauer& Poremski, 2016)
Conasprella janowskyae (J.K. Tucker& M.J. Tenorio, 2011)
Graphiconus janus (C.H. Hwassin J.G. Bruguière, 1792)
Conus jaroldi (FOSSIL) M.J. Abbott, 1988 †
Conasprella jaspidea (J.F. Gmelin, 1791)
Conasprella jaspidea pealii (J. Green, 1830)
Conus javanus (FOSSIL) Martin, 1879 †
Profundiconus jeanmartini G. Raybaudi Massilia,1992
Chelyconus jenkinsi (FOSSIL) Martin, 1879 †
Conus jeremyi (FOSSIL) E.J. Petuch, 1994 †