There are 42 units in the Diocese of Rourkela.
- Ambapani Unit, (Estd:1997)
- Barilapta Unit, St Marys (1959)
- Barsuan Unit, St Thomas (1972)
- Birmitrapur Unit, St Paul’s (1950)
- Bonaigarh Unit, Prabhu Prakash (1985)
- Bondamunda Unit, Good Shepherd (1968)
- Gaibira Unit, St Ignatius (1922)
- Ghoghea Unit, St John the Baptist (1974)
- Gomardih Unit, St Marys (1968)
- Sacred Heart Cathedral, Rourkela (1918)
- Harasmara Unit, St Francis of Assisi (1992)
- Hemgir Unit, St Francis Xavier (1995)
- Jhorabahal Unit, Holy Trinity (1961)
- Jhunmur Unit, St Marys (1925)
- Jolda Unit, Christ The King (1968)
- Kahuchuan Unit, St Marys (2001)
- Kahupani Unit, St Marys (1972)
- Kalunga Unit, Risen Christ (1951)
- KansbahalUnit, St Joseph The Worker (1981)
- Kantapali Unit, Holy Family (1953)
- Kesramal Unit, St Francis Xavier (1908)
- Kirelega Unit, St Marys (1977)
- Koira Unit, St Francis Assisi (2001)
- Kuarmunda Unit, St John Bosco (1988)
- Kusumdegi Unit, Our Lady Assumed into Heaven (1929)
- Nuagaon Unit, All Saints (2000)
- Pankadih Unit, Catholic (1996)
- Pandrepali Unit, St. Francis De Sales (1993)
- Phalsa Unit, St Thomas (1961)
- Raidih Unit, St Peters (1995)
- Rajgangpur Unit, St Marys (1961)
- Salangabahal Unit, St Thomas The Apostle (1972)
- Saunamara Unit, Jagat Mata (1998)
- Siabahal Unit, St Vincent Palloti (1995)
- Sikajor Unit, St Joseph (1966)
- Singarmunda Unit, St Marys (1968)
- Sundargarh Unit, St Marys (1952)
- Telendih Unit, St Josephs (1957)
- Thakurpali Unit, Our Lady of Holy Rosary (1979)
- Deonapara Unit, St Francis Xavier (2003)
- Tangrain Unit, St Francis Xavier (2010)
- Jhirpani Unit, Immaculate Conception (2014).