Espostoa is a genus of columnar cacti, comprising 16 species known from the Andes of southern Ecuador and Peru.

The genus is named after Nicolas E. Esposto, a renowned botanist from Lima.

In adulthood, a cephalium sometimes appears, similar to the Mexican genus Cephalocereus.

[citation needed] They were discovered by Alexander von Humboldt and Aimé Bonpland in the early nineteenth century.

As of October 2023[update], Plants of the World Online accepted the following species:[1] Data related to Espostoa at Wikispecies This Cactaceae article is a stub.