Missouri

(Novinger) St. Rose of Lima

(O Fallon) St. Barnabas

(O'Fallon) Assumption of the BVM

(Oak Grove) St. Jude

(Oakville) St. Francis of Assisi

(Odessa) St. George

(Old Monroe) Immaculate Conception

(Oran) Guardian Angel Catholic Church

(Osage Bend) St. Margaret of Antioch

(Overland) All Souls

(Overland) Our Lady of the Presentation

(Owensville) Immaculate Conception