• Agaphelidae Gray, 1870 (unaccepted)
• Balaenidae
• Balaenopteridae Gray, 1864
• Balanadae Gray, 1821 accepted as Balaenidae
• Belugidae Gray, 1868 accepted as Monodontidae Gray, 1821
• Catodontidae F. Cuvier, 1836 accepted as Physeteridae
• Cetotheriidae Brandt, 1872 †
• Delphinapteridae Kasuya, 1973 accepted as Delphinidae Gray, 1821
• Delphinapteridae Slijper, 1936 accepted as Monodontidae Gray, 1821
• Delphinidae Gray, 1821
• Delphinoidae Guerin, 1874 accepted as Delphinidae Gray, 1821
• Delphinorhynchidae Sclater, 1887 (uncertain > nomen dubium)
• Delphinusideae Lesson, 1842 accepted as Delphinidae Gray, 1821
• Eomysticetidae Sanders & Barnes, 2002 †
• Eschrichtidae Miller & Kellogg, 1955 accepted as Eschrichtiidae Ellerman & Morrison-Scott, 1951
• Eschrichtiidae Ellerman & Morrison-Scott, 1951
• Globicephalidae Nishiwaki, 1963 accepted as Globicephalinae Le Duc, 1997
• Globidelphinidae Nishiwaki, 1963 accepted as Delphinidae Gray, 1821
• Globiocephalidae Gray, 1850 accepted as Globicephalinae Le Duc, 1997
• Grampidae Gray, 1871 accepted as Globicephalinae Le Duc, 1997
• Heterodontidae Girard, 1852 accepted as Ziphiidae Gray, 1850
• Holodontidae Brandt, 1873 (unaccepted)
• Hyperoodontidae Gray, 1846 accepted as Ziphiidae Gray, 1850
• Hypognathodontidae Brandt, 1873 (unaccepted)
• Iniidae Gray, 1846
• Kekenodontidae Mitchell, 1989 †
• Kogiidae Gill, 1871
• Lipotidae Zhou, Qian & Li, 1978
• Monodontidae Gray, 1821
• Mysticeti incertae sedis (temporary name)
• Neobalaenidae Gray, 1873
• Norvallidae Burnett, 1830 accepted as Monodontidae Gray, 1821
• Odontoceti incertae sedis (temporary name)
• Orcadae Gray, 1871 accepted as Delphinidae Gray, 1821
• Orcaelidae Nishiwaki, 1972 accepted as Delphinidae Gray, 1821
• Orcaellidae Nishiwaki, 1963 accepted as Delphinidae Gray, 1821
• Phocoenidae
• Physalinidae Gray, 1868 accepted as Balaenopteridae Gray, 1864
• Physeteridae
• Platanistidae Gray, 1846
• Pontoporiidae Gray, 1870
• Rachianectidae Weber, 1904 accepted as Eschrichtiidae Ellerman & Morrison-Scott, 1951
• Squalodontidae Brandt, 1873 †
• Stenidae Fraser & Purves, 1960 accepted as Stenoninae Le Duc, 1997
• Susuidae Hershkovitz, 1966 accepted as Platanistidae Gray, 1846
• Susuoidea Gray, 1868 accepted as Platanistidae Gray, 1846
• Tachynicidae Brookes, 1828 accepted as Monodontidae Gray, 1821
• Waipatiidae Fordyce, 1994 †
• Xiphidae Ameghino, 1889 accepted as Ziphiidae Gray, 1850
• Ziphiidae Gray, 1850