Saint Irenaeus

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Diocese of Pittsburgh Shield

Mass Schedule:

Saturday Vigil: 4:30 p.m.

Sunday: 8:00, 11:00 a.m.

Weekdays: T/W/Th 8:00 a.m.

Holy Days: H 10:00 a.m.; 7:00 p.m.


Saturday: 11:00 a.m.

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Religious Education:

637 4th Street
Oakmont, PA 15139
Phone: 412-828-9450

Administrative Center:

387 Maryland Ave
Oakmont , PA 15139
Phone: 412-828-3065
Fax: 412-828-1587

Church Building:

385 Maryland Ave
Oakmont , PA 15139

School: Saint Irenaeus:

637 4th St
Oakmont, PA 15139
Phone: 412-828-8444
Fax: 412-828-8749


Rev. George R. Dalton, Administrator

Additional Information:

Parish ID:


Open Date:


Neighborhoods Served:


Parish History

St. Irenaeus was established in 1907.  Before the parish was founded, Catholics living in Oakmont had to travel to St. Joseph, Verona to attend Mass.  In 1906, a group of these Catholics petitioned the bishop for permission to form a parish.  In 1907, the bishop granted permission and assigned a priest to the new parish.  The parish purchased an existing church from the Episcopal St. Thomas parish and renovated it.  The church was dedicated in March of 1907. 

The congregation continued to grow.  Recognizing that a new, larger church would eventually be needed, the pastor purchased additional land in December of 1921.  However, due to other financial commitments, work did not begin on a new church for three decades.  Not until May 25, 1952, was ground broken for the church.  The cornerstone was laid on December 17, 1952, and the completed church was dedicated on November 7, 1953.

The church was renovated in 1981 and 1982.  The renovation included the installation of new stained glass windows.

Photos From the Diocesan Archive:

First St. Irenaeus Church, 1933
Interior of church, 1933
Second St. Irenaeus Church, 2002
Altar of second church, 2002

File Attachments:

St. Irenaeus Parish Map.pdf172.83 KB