Conus imperialis compactus Wils, 1970
Conus imperialis douvillei Fenaux, 1942
Conus imperialis Linnaeus, 1758
Conus imperialis queketti E. A. Smith, 1906
Conus inconstans E. A. Smith, 1877
Conus indomaris (Bozzetti, 2014)
Conus inesae Monteiro, Afonso, Tenorio, Rosado & Pirinhas, 2014
Conus infinitus Rolán, 1990
Conus infrenatus Reeve, 1848
Conus inscriptus batheon Sturany, 1903
Conus inscriptus cuneiformis Reeve, 1843
Conus inscriptus Reeve, 1843
Conus insculptus hypochlorus Tomlin, 1937
Conus insculptus Kiener, 1845
Conus insularis Gmelin, 1791
Conus iodostoma Reeve, 1843
Conus ione Fulton, 1938
Conus irregularis iberogermanicus Röckel, Rolán & A. Monteiro, 1980
Conus irregularis Sowerby, 1857
Conus isabelarum Tenorio & Afonso, 2004
Conus itapua Petuch & Berschauer, 2018
Conus jacarusoi Petuch, 1998
Conus janapatriceae Petuch & Berschauer, 2016
Conus janowskyae (Tucker & Tenorio, 2011)
Conus janus Hwass, 1792
Conus jeanmartini (G. Raybaudi Massilia, 1992)
Conus jickelii Weinkauff, 1873
Conus joanae (Petuch & Berschauer, 2018)
Conus jonsingletoni H. Morrison, 2019
Conus josegeraldoi (Cossignani & Fiadeiro, 2018)
Conus josegeraldoi Cossignani & Fiadeiro, 2018
Conus josei (Petuch & Berschauer, 2016)
Conus josephinae demisgeraldoi Cossignani & Fiadeiro, 2018
Conus josephinae Rolán, 1980
Conus joserochoi (Cossignani, 2014)
Conus jourdani da Motta, 1984
Conus jucundus Sowerby, 1887
Conus judaeus Bergh, 1895
Conus juliaallaryae (T. Cossignani, 2013)
Conus julieandreae Cargile, 1995
Conus julii Lienard, 1870
Conus kahiko Kohn, 1980
Conus kalafuti da Motta, 1987
Conus kantanganus da Motta, 1982
Conus kashiwajimensis Shikama, 1971
Conus kawamurai Habe, 1962
Conus kellyae (Petuch, Berschauer & Poremski, 2017)
Conus keppensi (Petuch & Berschauer, 2018)
Conus kermadecensis Iredale, 1912
Conus kersteni Tenorio, Afonso & Rolan, 2008
Conus kevani Petuch, 1987
Conus kiicumulus (Azuma, 1982)
Conus kikaiensis Pilsbry, 1904
Conus kinoshitai (Kuroda, 1956)
Conus kinoshitai calliginosus Shikama, 1979
Conus kinoshitai tamikoae Shikama, 1973
Conus kintoki Habe & Kosuge, 1970
Conus kirkandersi Petuch, 1987
Conus klemae (Cotton, 1953)
Conus knudseni Sander, 1982
Conus kohni McLean & Nybakken, 1979
Conus kolaceki (T. Cossignani, 2023)
Conus korni G. Raybaudi Massilia, 1993
Conus kostini Filmer, Monteiro, Lorenz & Verdasca, 2012
Conus koukae (Monnier, Limpalaër & Robin, 2013)
Conus krabiensis da Motta, 1982
Conus kulkulcan Petuch, 1980
Conus kuroharai (T. Habe, 1965)
Conus lani Crandall, 1979
Conus lapulapui da Motta & R. Martin, 1982
Conus largilliertii Kiener, 1847
Conus laterculatus G. B. Sowerby II, 1870
Conus laueri Monnier & Limpalaer, 2013
Conus lecourtorum (Lorenz, 2011)
Conus leehmani da Motta & Röckel, 1979
Conus legatus Lamarck, 1810
Conus lenavati da Motta & Röckel, 1982
Conus lenhilli Cargile, 1998
Conus lentiginosus Reeve, 1844
Conus leobottonii Lorenz, 2006
Conus leobrerai da Motta & R. Martin, 1982
Conus leopardus (Röding, 1798)
Conus levistimpsoni Tucker, 2013
Conus lienardi Bernardi & Crosse, 1861
Conus ligatus Tate, 1890
Conus limpalaeri (Tenorio & Monnier, 2016)
Conus limpusi Röckel & Korn, 1990
Conus lindajoyceae Petuch, 1991†
