Idiagonum is a genus of beetles in the family Carabidae, containing the following species:
Idiagonum asperius Darlington, 1952Idiagonum asperum Darlington, 1952Idiagonum darlingtoni Baehr, 2000Idiagonum eliti Baehr, 2000Idiagonum giluwe Darlington, 1971Idiagonum inasperum Darlington, 1952Idiagonum latior Baehr, 2000Idiagonum limatulum Darlington, 1971Idiagonum longipenne Baehr, 2000Idiagonum macrocephalum Baehr, 2000Idiagonum muscorum Darlington, 1952Idiagonum opacicolle Baehr, 2000Idiagonum riedeli Baehr, 2000Idiagonum sinuatipenne Baehr, 2000