Union High School, the pioneer English School in Salcette, Goa, was founded on 13th July, 1899 by the late Roque Santana Gracias. In 1932 it was acquired by the Archdiocese of Goa in the time of H.E. Dom. Theotonio Vieira de Castro, and called St. Theotonius Union High School. In 1944, this Institution was entrusted to the Goa Jesuits Society by H.E. the Patriarch Dom Jose da Costa Nunes. Now the school is known as Loyola High School, so named after the Founder of the Jesuits, St. Ignatius of Loyola.

The school, which is recognised by the Government of Goa, and prepares pupils for the Secondary School Certificate Examinations, is owned and managed by Jesuit Education Society (Goa) which belongs to the Christian Religious minority group and therefore enjoys the rights and privileges guaranteed by Art.30[i] of the Constitution of India.

The Society of Jesus to which the Jesuit Fathers and Brothers belong, is a Christian Religious Order founded by St. Ignatius of Loyola in 1540. Active in the field of education throughout the world since its origin, the society conducts in India nearly 100 high schools and over a dozen colleges in which thousands of young people belonging to every social class, community and linguistic group are being educated through the medium of both English and the regional languages. These institutions are part of the Catholic Church's efforts to share in the country's educational undertaking.

This effort while being particularly responsible towards the Christian community, has always been at the service of the whole nation.