There are 3 districts: South Johor, North Johor and Melaka. There are currently 20 churches administered under 17 parishes.
Vicariate of South Johor • Sacred Heart of Jesus Cathedral, Taman Seri Tebrau , Johor Bahru (1982) • Immaculate Conception Church, Tanjung Puteri, Johor Bahru (1883) • Christ the King Church, Kulai (1951) • Church Of The Divine Mercy, Skudai (2000) • Church Of The Immaculate Heart Of Mary, Pontian Kechil , Pontian (1863) • St. Joseph's Church, Plentong , Masai (1970) • St. Theresa Church, Masai (1937) • The Holy Family Church, Ulu Tiram (1972) • Church of St. Elizabeth, Kota Tinggi (1970) • Church Of Our Lady Of Lourdes, Pekan Nanas , Pontian (1969)
Vicariate of North Johor • Church of St. Anthony, Cha'ah , Segamat (1968) • St. Louis Church, Kluang (1928) •
St. Philip's Church, Segamat (1924) • St. Peter's Church, Mersing (1957) • St. Simon's Church, Labis , Segamat (1926) • St. Henry's Church, Batu Pahat (1926) • St. Andrew's Church, Muar (1909) • St. Matthew's Church, Tangkak (1941)
Vicariate of Malacca •
Church of St. Francis Xavier (Melaka) , Melaka City (1845) •
St. Peter's Church (Melaka) , Melaka City (1710) •
St. Theresa's Church (Melaka), Gajah Berang, Central Malacca (1941) • Church Of The Assumption Melaka, Melaka City (1850) • Santa Cruz Church, Malim Jaya (1880) • St. Mary's Church, Ayer Salak, Melaka City (1848) • Church Of Our Lady Of Guadalupe (1541/2009) • Church Of The Holy Spirit, Jasin (1989) == Ordinaries ==