Between brackets is the number of accepted extant species
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- Decapoda (17 683)
- Suborder Decapoda incertae sedis †
- Suborder Dendrobranchiata (533)
- Suborder Euzygida accepted as Stenopodidea
- Suborder Heterochelida
- Suborder Macrura
- Suborder Macrura reptantia
- Suborder Natantia
- Suborder Pleocyemata (17 150)
- Infraorder Achelata (153)
- Infraorder Anomura (3 414)
- Infraorder Astacidea (783)
- Infraorder Axiidea (600)
- Infraorder Brachyura (7 883)
- Section Callichimaeroida †
- Section Cyclodorippoida (110)
- Section Dakoticancroida †
- Section Dromiacea (189)
- Section Etyoida †
- Section Eubrachyura (7 446)
- Subsection Heterotremata (6 086)
- Subsection Thoracotremata (1 360)
- Superfamily Aphanodactyloidea Ahyong & Ng, 2009 (16)
- Superfamily Cryptochiroidea Paulson, 1875 (56)
- Superfamily Grapsoidea MacLeay, 1838 (645)
- Superfamily Ocypodoidea Rafinesque, 1815 (332)
- Family Camptandriidae Stimpson, 1858 (42)
- Family Dotillidae Stimpson, 1858 (69)
- Family Gelasimidae Miers, 1886 accepted as Ocypodidae Rafinesque, 1815
- Family Heloeciidae H. Milne Edwards, 1852 (1)
- Family Lazarocleistostomidae Števčić, 2011 accepted as Dotillinae Stimpson, 1858
- Family Macrophthalmidae Dana, 1851 (74)
- Family Mictyridae Dana, 1851 (8)
- Family Ocypodidae Rafinesque, 1815 (133)
- Subfamily Gelasiminae Miers, 1886 (98)
- Genus Amphiuca Crane, 1975 accepted as Paraleptuca Bott, 1973
- Genus Australuca Crane, 1975 accepted as Tubuca Bott, 1973
- Genus Austruca Bott, 1973 (13)
- Genus Boboruca Crane, 1975 accepted as Leptuca Bott, 1973
- Genus Celuca Crane, 1975 accepted as Leptuca Bott, 1973
- Genus Cranuca Beinlich & von Hagen, 2006 (1)
- Genus Deltuca Crane, 1975 accepted as Tubuca Bott, 1973
- Genus Gelasimus Latreille, 1817 (8)
- Genus Leptuca Bott, 1973 (30)
- Genus Mesuca Bott, 1973 accepted as Gelasimus Latreille, 1817
- Subgenus Mesuca (Latuca) Bott, 1973 accepted as Gelasimus Latreille, 1817
- Subgenus Mesuca (Mesuca) Bott, 1973 accepted as Gelasimus Latreille, 1817
- Genus Minuca Bott, 1954 (18)
- Genus Paraleptuca Bott, 1973 (4)
- Genus Petruca Shih, Ng & Christy, 2015 (1)
- Genus Planuca Bott, 1973 accepted as Leptuca Bott, 1973
- Genus Thalassuca Crane, 1975 accepted as Gelasimus Latreille, 1817
- Genus Tubuca Bott, 1973 (22)
- Genus Xeruca Shih, 2015 (1)
- Subfamily Ocypodinae Rafinesque, 1815 (33)
- Subfamily Scopimerinae Alcock, 1900 accepted as Dotillinae Stimpson, 1858
- Subfamily Ucainae Dana, 1851 accepted as Ocypodinae Rafinesque, 1815
- Subfamily Ucidinae Števčić, 2005 (2)
- Subfamily Ucinae Dana, 1851 accepted as Ocypodinae Rafinesque, 1815
- Family Scopimeridae Alcock, 1900 accepted as Dotillinae Stimpson, 1858
- Family Ucididae Števčić, 2005 accepted as Ucidinae Števčić, 2005
- Family Xenophthalmidae Stimpson, 1858 (5)
- Superfamily Pinnotheroidea De Haan, 1833 (311)
- Section Homoloida (91)
- Section Podotremata accepted as Brachyura
- Section Raninoida (47)
- Section Torynommoida †
- Family Brachyura incertae sedis
- Family Cretapsaridae Luque in Luque, Xing, Briggs, Clark, Duque, Hui, Mai & McKellar, 2021 †
- Family Montemagrechiridae Klompmaker, Portell & van der Meij, 2016 †
- Genus Psammograpsus A. Milne-Edwards, 1860 †
- Genus Zoea Bosc, 1801
- Infraorder Callianassidea accepted as Axiidea
- Infraorder Caridea (3 919)
- Infraorder Gebiidea (252)
- Infraorder Glypheidea (2)
- Infraorder Palaeopalaeomonida †
- Infraorder Polychelida (38)
- Infraorder Procarididea (6)
- Infraorder Stenopodidea (100)
- Suborder Reptantia
- Suborder Trichelida