Numbers of extant and extinct (†) species are given in brackets.
The superfamily Eocarcinoidea, containing Eocarcinus and Platykotta, was formerly thought to contain the oldest crabs; it is now considered part of the Anomura.

Section †Callichimaeroida
†Callichimaeroidea (1†)
Section Dromiacea
†Dakoticancroidea (6†)
Dromioidea (147, 85†)
Glaessneropsoidea (45†)
Homolodromioidea (24, 107†)
Homoloidea (73, 49†)
Section Raninoida (46, 196†)
Section Cyclodorippoida (99, 27†)
Section Eubrachyura
Subsection Heterotremata
Aethroidea (37, 44†)
Bellioidea (7)
Bythograeoidea (14)
Calappoidea (101, 71†)
Cancroidea (57, 81†)
Carpilioidea (4, 104†)
Cheiragonoidea (3, 13†)
Corystoidea (10, 5†)
†Componocancroidea (1†)
Dairoidea (4, 8†)
Dorippoidea (101, 73†)
Eriphioidea (67, 14†)
Gecarcinucoidea (349)
Goneplacoidea (182, 94†)
Hexapodoidea (21, 25†)
Leucosioidea (488, 113†)
Majoidea (980, 89†)
Orithyioidea (1)
Palicoidea (63, 6†)
Parthenopoidea (144, 36†)
Pilumnoidea (405, 47†)
Portunoidea (455, 200†)
Potamoidea (662, 8†)
Pseudothelphusoidea (276)
Pseudozioidea (22, 6†)
Retroplumoidea (10, 27†)
Trapezioidea (58, 10†)
Trichodactyloidea (50)
Xanthoidea (736, 134†)
Subsection Thoracotremata
Cryptochiroidea (46)
Grapsoidea (493, 28†)
Ocypodoidea (304, 14†)
Pinnotheroidea (304, 13†)
Numbers of extant and extinct (†) species are given in brackets. The superfamily Eocarcinoidea, containing Eocarcinus and Platykotta, was formerly thought to contain the oldest crabs; it is now considered part of the Anomura.
Section †Callichimaeroida
†Callichimaeroidea (1†)
Section Dromiacea
†Dakoticancroidea (6†)
Dromioidea (147, 85†)
Glaessneropsoidea (45†)
Homolodromioidea (24, 107†)
Homoloidea (73, 49†)
Section Raninoida (46, 196†)
Section Cyclodorippoida (99, 27†)
Section Eubrachyura
Subsection Heterotremata
Aethroidea (37, 44†)
Bellioidea (7)
Bythograeoidea (14)
Calappoidea (101, 71†)
Cancroidea (57, 81†)
Carpilioidea (4, 104†)
Cheiragonoidea (3, 13†)
Corystoidea (10, 5†)
†Componocancroidea (1†)
Dairoidea (4, 8†)
Dorippoidea (101, 73†)
Eriphioidea (67, 14†)
Gecarcinucoidea (349)
Goneplacoidea (182, 94†)
Hexapodoidea (21, 25†)
Leucosioidea (488, 113†)
Majoidea (980, 89†)
Orithyioidea (1)
Palicoidea (63, 6†)
Parthenopoidea (144, 36†)
Pilumnoidea (405, 47†)
Portunoidea (455, 200†)
Potamoidea (662, 8†)
Pseudothelphusoidea (276)
Pseudozioidea (22, 6†)
Retroplumoidea (10, 27†)
Trapezioidea (58, 10†)
Trichodactyloidea (50)
Xanthoidea (736, 134†)
Subsection Thoracotremata
Cryptochiroidea (46)
Grapsoidea (493, 28†)
Ocypodoidea (304, 14†)
Pinnotheroidea (304, 13†)
Crab