Phansu is a village in the Ratnagiri district of Maharashtra, in the Dapoli taluka. It is a rural town located in the Konkan division. The 2011 Census of India recorded a total of 1,069 residents in the village. Phansu's geographical area is approximately .
Phansu is named after the jackfruit tree, called "phanas." It is the ancestral land of the Pethes. The Pethes are a Chitpavan family.
Phansu has a school, several stores, and a Hanuman temple.