Xavier High School is a private, Catholic coeducational college preparatory school high school run by the US East Province of the Society of Jesus on the island of Weno in Chuuk, Federated States of Micronesia. It was established by the Jesuits in 1952. It was the first high school in the Trust Territory of the Pacific Islands. Bishop Thomas Feeney, S.J., D.D. from the New York Province of the Society of Jesus originally envisioned a minor seminary to train local clergy. Soon after, Xavier Seminary became the first college preparatory school in the Western Pacific.

Chuuk State is one of the four states of the Federated States of Micronesia (FSM). The other states are Kosrae State, Pohnpei State, and Yap State. It consists of several island groups: Namoneas, Faichuuk, the Hall Islands, Namonuito Atoll, Pattiw, and the Mortlock Islands. Chuuk is by far the FSM's most populous state, with 50,000 inhabitants on 120 square kilometers. Chuuk Lagoon is where most people live. Weno island, in the lagoon, is Chuuk's state capital and the country's biggest city. It may hold a referendum on independence in the near future, although this referendum has been repeatedly postponed.