Nassarius iodes (W.H. Dall, 1917)
Ilyanassa irrorata (FOSSIL) (T.A. Conrad, 1863 †)
Nassarius irus (E.C. Von Martens, 1880)
Nassarius ischnus (J.C. Melvill, 1899)
Ilyanassa isogramma (FOSSIL) W.H. Dall, 1892 †
Tritiaria jacksonensis (FOSSIL) †
Nassarius jacksonianus (J.R.C. Quoy& J.P. Gaimard, 1833)
Nassarius jactabundus (J.C. Melvill, 1906)
Nassarius janschloegli (FOSSIL) M. Harzhauser & al.,2011 †
Nassaria javana (FOSSIL) K. Martin, 1879 †
Dorsanum javanum (FOSSIL) K. Martin, 1931 †
Nassarius javanus (M.M. Schepman, 1891)
Nassarius jeanmartini H.H. Kool & H. Dekker,2006
Nassarius johni (T.A. de M. Monterosato,1889)
Ilyanassa johnsoni (FOSSIL) W.H. Dall, 1892 †
Nassarius jonasii (R.W. Dunker, 1846)
Bullia jucunda W.H. Turton, 1932
Nassarius junghuhni (FOSSIL) (K. Martin, 1895 †)
Nassarius kaicherae D. De Jong & H.E. Coomans,1988
Phrontis karinae (G.W. Nowell-Usticke,1971)
Tritia karoroensis (FOSSIL) (P.A. Maxwell, 1988 †)
Nassarius kiiensis T. Kira, 1954
Nassarius kochianus (R.W. Dunker, 1846)
Nassarius kochianus crawfordi G.B. III Sowerby, 1892
Nassarius kometubus (FOSSIL) Y. Otuka, 1934 †
Nassarius kondangensis (FOSSIL) (C.H. Oostingh, 1939 †)
Nassarius kooli H. Dekker & A.M. Dekkers,2009
Nassarius korytnicensis (FOSSIL) (W. Baluk, 1995 †)
Nassarius kraussianus (R.W. Dunker, 1846)
Nassarius kruizingai (FOSSIL) C.H. Oostingh, 1939 †
Nassarius kugleri (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Bullia kurrachensis G.F. Angas, 1877
Nassarius labiatus (A. Adams, 1853)
Amyclina labiosa (FOSSIL) (J. de C. Sowerby,1824 †)
Nassarius labordei F.P. Jousseaumein J. Giner Mari, 1929