St. John Catholic Church or St. John's Catholic Church, and variations, may refer to:
Australia St John's Catholic Church, Campbelltown, New South Wales
United States (by state then city) St. John the Evangelist Catholic Church (Indianapolis, Indiana) St. John's Catholic Church (Bangor, Maine), listed on the NRHP in Maine St. John Catholic Church (Saint John Plantation, Maine) St. John's Catholic Church (Worcester, Massachusetts) St. John the Baptist Catholic Church (Canton, Ohio), listed on the NRHP in Ohio St. John's Catholic Church (Delphos, Ohio), listed on the NRHP in Ohio St. John's Catholic Church (Fryburg, Ohio), listed on the NRHP in Ohio St. John's Catholic Church (Paxton, South Dakota), listed on the NRHP in South Dakota
South Korea St. John's Church, Seongnam, also known as St. John's Catholic Church
Iraq St. John's the Baptist Catholic Church, Baghdad, in Hay Al-Athoriyeen district
See also St. John's Church (disambiguation)