| Allison | St. Theresa Parish | 1953 | 1976 | St. Peter Parish, Brownsville |
| Alverda | Sacred Heart Parish | 1930 | 1995 | Curch of the Resurrection, Northern Indiana County |
| Arcadia | SS. Peter and Paul Parish | 1906 | 1995 | Church of the Resurrection, Northern Indiana County |
| Arnold | All Saints Parish | 1926 | 2008 | St. Joseph, New Kensington |
| Aultman | St. Anthony Parish | 1918 | 1989 | Church of the Good Shepherd, Kent |
| Black Lick (Josephine) | St. Bonaventure Parish | 1910 | 2002 | Our Lady of the Assumption Parish, Coral |
| Bolivar | St. Mary Parish | 1872 | 2008 | Holy Family, Seward |
| Bovard | St. Bede Parish | 1915 | 2008 | Blessed Sacrament Cathedral, Greensburg |
| Brady's Bend | St. Mary Parish | 1863 | 1886 | St. Patrick Parish, Brady's Bend |
| Braeburn (Lower Burrell) | St. John Bosco Parish | 1937 | 1999 | St. Margaret Mary, Lower Burrell |
| Brier Hill | St. Hedwig Parish | 1906 | 1977 | St. John the Baptist, Perryopolis |
| Brownsville | Sacred Heart Parish | 1926 | 1968 | Immaculate Conception, Connellsville |
| Brownsville | St. Mary Parish | 1906 | 2005 | St. Peter, Brownsville |
| Buffalo Creek (Worthington Station) | St. Francis Parish | 1937 | 1971 | St. Mary, Our Lady of Guadalupe, Kittanning |
| Calumet (Mammoth) | St. Stanislaus Parish | 1890 | 2008 | St. Florian, United |
| Cameron's Bottom | St. Patrick Parish | 1832 | 1995 | Church of the Resurrection, Northern Indiana County |
| Cardale | St. Mary, Madonna of Czestochowa Parish | 1908 | 2013 | St. Francis of Assisi, Western Fayette County |
| Chestnut Ridge (Latrobe) | St. Boniface Parish | 1970 | 2013 | St. Raymond of the Mountains, Donegal |
| Clymer | St. Anthony Parish | 1913 | 1995 | Church of the Resurrection, Northern Indiana County |
| Connellsville | Holy Trinity Parish | 1903 | 2008 | Immaculate Conception, Connellsville |
| Connellsville | Our Lady of Mount Carmel Parish | 1901 | 1913 | St. Rita, Connellsville |
| Connellsville | St. Emory Parish | 1903 | 1970 | Immaculate Conception, Connellsville |
| Coral (Graceton) | St. Francis Parish | 1910 | 2008 | Our Lady of the Assumption, Coral |
| Cowansville | St. Francis Parish | 1954 | 1956 | St. Mary, Our Lady of Guadalupe, Kittanning |
| Dawson | Sacred Heart Parish | 1889 | 2007 | Immaculate Conception, Connellsville |
| Derry | Mount Carmel Chapel | 1822 | 1898 | St. Martin, New Derry |
| Dilltown | Annunciation Parish | 1933 | 1974 | Holy Family, Seward |
| Dixonville | Sacred Heart Parish | 1910 | 1995 | Church of the Resurrection, Northern Indiana County |
| East Vandergrift | All Saints Parish | 1922 | 1985 | Our Lady, Queen of Peace, East Vandergrift |
| East Vandergrift | Holy Trinity Parish | 1916 | 1985 | Our Lady, Queen of Peace, East Vandergrift |
| East Vandergrift | St. Casimir Parish | 1922 | 1985 | Our Lady, Queen of Peace, East Vandergrift |
| Elliottsville | Visitation of the Blessed Virgin Mary Parish | 1900 | 1962 | St. Joan of Arc, Farmington |
| Ernest | Assumption Parish | 1907 | 1995 | Church of the Resurrection, Northern Indiana County |
| Fayette City | Holy Spirit Parish | 1964 | 2008 | St. Sebastian, Belle Vernon |
| Fayette City | St. Edward Parish | 1902 | 1964 | St. Sebastian, Belle Vernon |
| Fayette City | St. Eusebius Parish | 1911 | 1964 | St. Sebastian, Belle Vernon |
| Footedale | St. Thomas Parish | 1901 | 2013 | St. Francis of Assisi, Western Fayette County |
| Forbes Road | St. Mary Parish | 1909 | 2008 | St. Bartholomew, Crabtree |
| Ford City | Holy Trinity Parish | 1900-01 | 2002 | Christ, Prince of Peace, Ford City |
| Ford City | St. Francis of Paola Parish | 1900 | 2002 | Christ, Prince of Peace, Ford City |
| Ford City | St. Mary Parish | 1888 | 2002 | Christ, Prince of Peace, Ford City |
| Gates Mine | St. Mary Parish | 1906 | 1985 | St. Francis of Assisi, Western Fayette County |
| Glen Campbell | St. Michael Parish | 1900 | 1995 | Church of the Resurrection, Northern Indiana County |
| Greensburg | St. Anthony Parish | 1917 | 1955 | St. Paul, Greensburg |
| Heilwood | St. John the Baptist Parish | 1909 | 1995 | Church of the Resurrection, Northern Indiana County |
| Hunker | St. Gilbert Parish | 1926 | 2002 | Holy Cross, Youngwood |
| Hyde Park | St. Francis Parish | 1954 | 1999 | Christ the King, Leechburg |
| Isabella | St. Julian Parish | 1925 | 2008 | St. Peter, Brownsville |
| Iselin | Holy Cross Parish | 1908 | 1989 | Church of the Good Shepherd, Kent |
| Johnetta | St. Rose Parish | 1923 | 1997 | St. Mary, Our Lady of Guadalupe, Kittanning |
| Keisterville | St. Casimir Parish | 1906 | 2001 | St. John the Baptist, Perryopolis |
| Leckrone (McClellandtown) | Our Lady of Perpetual Help Parish | 1902 | 2013 | St. Francis of Assisi, Western Fayette County |
| Leechburg | Assumption Parish | 1918 | 1999 | Christ the King, Leechburg |
| Leechburg | St. Catherine of Alexandria Parish | 1887 | 1999 | Christ the King, Leechburg |
| Leechburg | St. Martha Parish | 1911 | 1999 | Christ the King, Leechburg |
| Leisenring | St. Vincent de Paul Parish | 1888 | 2008 | St. Aloysius, Dunbar |
| Lemont Furnace | St. Cecilia Parish | 1883 | 2006 | St. Mary (Nativity), Uniontown |
| Lucernmines | St. Louis Parish | 1913 | 2008 | Our Lady of the Assumption, Coral |
| Madison | Our Lady of Victory Parish | 1893 | 1934 | St. Edward, Herminie |
| Madison Township | Rimer Mission | 1858 (or 1932) | 1941 | St. Mary, Our Lady of Guadalupe, Kittanning |
| Margaret | St. Ann Parish | 1943 | 1964 | St. Mary, Mother of God, Yatesboro |
| Masontown | All Saints Parish | 1908 | 2013 | St. Francis of Assisi, Western Fayette County |
| Maxwell | St. James Parish | 1936 | 2008 | St. Peter, Brownsville |
| McClellandtown | St. Francis de Sales Parish | 1908 | 2008 | St. Francis of Assisi, Western Fayette County |
| McIntyre | St. Gertrude Parish | 1917 | 1989 | Church of the Good Shepherd, Kent |
| Monessen | Most Holy Name of Jesus Parish | 1901-04 | 1991 | The Epiphany of Our Lord, Monessen |
| Monessen | St. Anthony Parish | 1952 | 1991 | The Epiphany of Our Lord, Monessen |
| Monessen | St. Cajetan Parish | 1920 | 1991 | The Epiphany of Our Lord, Monessen |
| Monessen | St. Hyacinth Parish | 1909 | 1991 | The Epiphany of Our Lord, Monessen |
| Monessen | St. Leonard Parish | 1900 | 1991 | The Epiphany of Our Lord, Monessen |
| Mount Pleasant | St. Bernardine Parish | 1906 | 1972 | St. Pius X, Mount Pleasant |
| Mount Pleasant | St. Joseph Parish | 1886 | 1972 | St. Pius X, Mount Pleasant |
| Mount Pleasant | Transfiguration Parish | 1890 | 2003 | St. Pius X, Mount Pleasant |
| New Florence | St. Mary Parish | 1854 | 2008 | Holy Family, Seward |
| New Kensington | St. Elizabeth Hungarian Parish | 1937 | 1959 | Christ the King, Leechburg |
| New Salem | St. Procopius Parish | 1905 | 2013 | St. Francis of Assisi, Western Fayette County |
| Newell | Our Lady of Perpetual Help Parish | 1937 | 1996 | St. Peter, Brownsville |
| Nicholson's Run | Church of the Guardian Angels Parish | 1872 | 1994 | St. Lawrence, Cadogan |
| Nu Mine | St. Gabriel Parish | 1927 | 1988 | St. Mary, Mother of God, Yatesboro |
| Palmer | St. Albert Parish | 1922 | 2008 | St. Francis of Assisi, Western Fayette County |
| Parker | St. Mary, Our Lady of Snows Parish | 1869 | 2008 | St. Patrick, Brady's Bend |
| Penn | St. Boniface Parish | 1863 | 2008 | Sacred Heart, Jeannette |
| Queenstown | SS. Peter and Paul Parish | 1847 or Before | 1866 | St. Patrick, Brady's Bend |
| Republic | Holy Rosary Parish | 1915 | 2013 | St. Francis of Assisi, Western Fayette County |
| Republic | St. Callistus Parish | 1911 | 1915 | St. Therese, Little Flower of Jesus, Uniontown |
| Rossiter | St. Francis Parish | 1904 | 1995 | Church of the Resurrection, Northern Indiana County |
| Sagamore | Sacred Heart Parish | 1912 | 2006 | St. Mary, Mother of God, Yatesboro |
| Schenley | St. Mary Parish | 1940 | 1971 | Christ the King, Leechburg |
| Seminole | SS. Cosmas and Damian Parish* | 1914 | 1996 | Diocese of Erie |
| Shoaf | St. Helen Parish | 1913 | 2007 | SS. Cyril and Methodius, Fairchance |
| Smithton | St. Timothy Parish | 1867 | 2008 | St. Anne, Rostraver |
| Smock | St. Hedwig Parish | 1906 | 2013 | St. John the Baptist, Perryopolis |
| Starford | St. Elizabeth Parish | 1907 | 1995 | Church of the Resurrection, Northern Indiana County |
| Strongtown or Strongstown | Seven Dolors Parish | 1871 | Between 1906-1920 | Church of the Resurrection, Northern Indiana County |
| Sugar Creek (Buffalo Creek) | St. Patrick Parish | 1801-06 | 2008 | St. Patrick, Brady's Bend |
| Sutersville | St. Charles Borromeo Parish | 1865 | 2008 | Holy Family, West Newton |
| Trauger | Forty Martyrs Parish | 1916 | 2008 | St. Florian, United |
| Uniontown | Holy Cross (Italian) Parish | 1908 | 1915 | St. Therese, Little Flower of Jesus, Uniontown |
| Uniontown | St. George Maronite Parish | 1921 | Not Closed | St. George Maronite, Uniontown |
| Waterman | Seven Dolors Parish | 1918 | 1961 | Our Lady of the Assumption, Coral |
| Webster | Holy Cross Parish | 1952 | 2000 | St. Anne, Rostraver |
| Wehrum | St. Fedelis Parish* | 1912 | 1929 | Holy Family, Seward |
| West Leisenring | St. Polycarp Parish | 1917 | 1997 | St. Aloysious, Dunbar |
| Wilpen | St. Ann Parish | 1913 | 2008 | Holy Trinity, Ligonier |
