The Holy Spirit Seminary is a community and an educational institution that was founded by the Roman Catholic Church in Papua New Guinea in Kap on 1 March 1963.

In January 1968 the seminary was transferred to Bomana, 12 kilometres from the centre of the capital of the country, Port Moresby. The purpose of the Holy Spirit Seminary is the education, formation and preparation of young men from 18 dioceses of Papua New Guinea for Roman Catholic Priesthood. According to the teaching of the Catholic Church, there are four aspects of the formation: human, spiritual, pastoral and intellectual. The intellectual education is divided in two aspects: philosophy and religious study, and theological study.

The seminarians are under the authority of the rector (nominated by the Congregation of the Evangelization of Peoples) and formators, his collaborators. The governing board of the Holy Spirit Seminary is the Catholic Bishops Conference of Papua New Guinea and the Solomon Islands.