St. Aloysius was established in 1892. Before the organization of the parish, local Catholics had to travel to Most Holy Name parish on Troy Hill to attend Mass, or, for the children, to attend school. Because of the difficulties in traveling to Troy Hill, particularly in winter, local Catholics decided that they needed a church of their own. On November 26, 1891, the first organizational meeting for a new parish was held. In 1892, a petition was sent to the bishop asking for permission to form a new parish. On April 12, 1892, the bishop visited the area, inspected the site chosen for the church and gave his permission to build the church.
Plans were made to construct a building that would hold not only the church, but also a school and a residence for a priest. The cornerstone for the new church was laid on July 10, 1892 and the completed building was dedicated on January 8, 1893. At first the parish was a mission of Most Holy Name but a resident pastor was assigned in June of 1893.
In 1905, a new rectory was built. The space in the building that had been used as the rectory was converted into a convent. By 1919, the church building was in need of extensive repairs. The existing steeple was replaced and the facade of the building was remodeled. In 1921, the interior of the church was also redecorated. The church was again renovated in 1947.
By the 1950's, the parish had expanded to the point that it needed a new church and school. On May 5, 1957, ground was broken for a new church and school building. The cornerstone was laid on July 10, 1957, and the completed building was dedicated on October 4, 1958. During this time, the old church/school building was demolished.
In 1980, the interior of the church was renovated and new stained glass windows installed.
With the turn of the century, trends in the Diocese of Pittsburgh began to reveal a decline in Mass attendance and sacramental participation. At the same time, the number of priests available for parish ministry also began to decline.
To address these challenges, Bishop David Zubik announced on April 12, 2015 a new diocesan initiative, On Mission for The Church Alive!, a consultative strategic planning process designed to foster viable, sustainable and vibrant parishes. As part of this process, the Bishop, in consultation with the faithful, began to consider new models of parish life based on pastoral needs, financial and temporal resources and available clergy.
In 2018, following the period of consultation, parishes were grouped together and served by a single clergy team to eventually form one new parish.
During this transition period, St. Aloysius Parish remained an independent parish while sharing clergy and staff and eventually publishing a joint bulletin with the other parishes. This ended on January 4, 2021 when St. Aloysius Parish merged with All Saints Parish, Etna; Holy Spirit Parish, Millvale and St. Bonaventure Parish, Glenshaw to form the new St. Matthew Parish. As part of the merger St. Aloysius Church remained open as part of the new parish.
