Phagsoo (also Fagsu) is a village and tehsil in the Doda district of the Jammu division of Jammu and Kashmir, India. It was previously part of the Thathri tehsil.
Phagsoo's boundaries are a dense forest in the north, two streams (Nallahs) in the east, and the town of Jangalwar in the south.
Phagsoo village is located from Thathri, its subdistrict headquarters, and from Doda district. The nearest villages near Phagsoo are Jangalwar, Madan Chittar, Nowtass and Kahila.
The village is spread over . Its population is 2,709 (1,386 males and 1,323 females) living in 480 houses.