Omalotheca is a genus of flowering plants in the family Asteraceae.

[3][2] It is commonly known as arctic cudweed.

[4][5] There is some disagreement about which species should be included in Omalotheca.

Some or all of the species are sometimes included in Gnaphalium.

[6] As of April 2023[update], Plants of the World Online accepted the following species:[7]