Haesselia is a genus of liverworts in the family Cephaloziaceae. It contains the following species (but this list may be incomplete):
The genus name of Haesselia is in honour of Gabriela Hässel de Menéndez (1927-2009), who was an Argentine bryologist.
The genus was circumscribed by Riclef Grolle and Stephan Robbert Gradstein in 1988.