Congener may refer to:

• Congener (biology), organisms within the same genus
• Congener (chemistry), related chemicals, e.g., elements in the same group of the periodic table
• Congener (beverages), a substance other than ethanol produced during the fermentation of alcoholic beverages

• Agabus congener, a beetle in the family Dytiscidae
• Amata congener, a moth in the family Erebidae
• Amyema congener, a flowering plant in the family Loranthaceae
• Arthroplea congener, a mayfly in the family Arthropleidae
• Elaphropus congener, a ground beetle in the family Carabidae
• Gemmula congener, a sea snail in the family Turridae
• Heterachthes congener, a beetle in the family Cerambycidae
• Lestes congener, a damselfly in the family Lestidae
• Megacyllene congener, a beetle in the family Cerambycidae
• Potamarcha congener, a dragonfly in the family Libellulidae

• Congenic, in genetics
• PCB congener list