Nassaria nivea (J.F. Gmelin, 1790)
Nassarius niveus (A. Adams, 1852)
Nassarius niveus scopularcus K.H. Barnard, 1958
Nassarius nobilis (K.H.J. Thiele, 1925)
Nassarius nodicinctus Adams, 1852
Phos nodicostatus A. Adams, 1851
Nassarius nodicostatus (A. Adams, 1852)
Nassarius nodifer (W.L. Powys, 1835)
Dorsanum nodosocostatum (FOSSIL) Hilber, 1879 †
Keepingia nodulina (FOSSIL) (Garvie, 2013 †)
Keepingia nodulina meta (FOSSIL) (Garvie, 2013 †)
Nassarius nodulosus (F.P. Marrat, 1873)
Nassarius noguchii (T. Habe, 1958)
Northia northiae (Gray in E. Griffith& E. Pidgeon, 1833)
Northia northiae miocenica (FOSSIL) A.A. Olsson, 1922 †
Engoniophos notatus (G.B. II Sowerby, 1859)
Nassarius notoensis (FOSSIL) O. Masuda, 1956 †
Nassarius novaehollandiae L.A. Reeve, 1845
Nassarius novaezelandiae (L.A. Reeve, 1854)
Nassarius nuceus (W.H. Pease, 1869)
Nassarius nucleolus (R.A. Philippi, 1846)
Bullia nuttalli R.N. Kilburn, 1978
Nassarius nuttalli (FOSSIL) (N.H. Ludbrook, 1978 †)
Hebra oberwimmeri (H.B. Preston, 1907)
Nassarius obesus (G. Nevill & H. Nevill,1875)
Cyllene obliqua L.C. Kiener, 1849
Nassarius obliquatus (FOSSIL) (G.B. Brocchi, 1814 †)
Nassarius oblitus (FOSSIL) L.M.D. Bellardi, 1882 †
Tritia obsoleta (T. Say, 1822)
Demoulia obtusata (J.H.F. Link, 1807)
Nassarius ocellatus H.H. Kool & J. Galindo,2014
Nassaria okinavia (Mac Neil, 1960)
Nassarius olivaceus (J.G. Bruguière, 1789)
Nassarius olomea E.A. Kay, 1979
Globinassa olssoni (FOSSIL) E.J. Petuch, 1994 †