Cossonus is a weevil genus.

Species include:

• Cossonus americanus Buchanan, 1936
• Cossonus corticola Say, 1831
• Cossonus crenatus Horn, 1873
• Cossonus ellipticollis Van Dyke, 1915
• Cossonus fossicollis Van Dyke, 1916
• Cossonus hamiltoni Slosson, 1899
• Cossonus hubbardi Schwarz, 1899
• Cossonus impressifrons Boheman, 1838
• Cossonus impressus Boheman, 1838
• Cossonus linearis
• Cossonus lupini Van Dyke, 1915
• Cossonus marginalis
• Cossonus murrayi (Wollaston, 1874)
• Cossonus pacificus Van Dyke, 1916
• Cossonus parallelepipedus
• Cossonus piniphilus Boheman, 1838
• Cossonus platalea Say, 1831
• Cossonus ponderosae Van Dyke, 1915
• Cossonus quadricollis Van Dyke, 1915
• Cossonus rufipennis Buchanan, 1936
• Cossonus schwarzi Van Dyke, 1916
• Cossonus spathula Boheman, 1838
• Cossonus texanus Van Dyke, 1915

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