The Parish of Renmore, as we know it today was established in 1971.
Canon Jack O’Connor was its first parish priest and he quickly set about the task of building schools to cater for the rapidly growing population. Scoil Chaitríona Junior enrolled 104 boys and 103 girls on 2nd July 1973 under its first principal, Roisín Bean Mhic Cumhaill.
The other five teachers on the staff at the time were Mrs. Joan Ray, Mrs. Eileen O’Donnell, Mrs. Mary Smith, Sr. Noirín Concannon and Ms. Máire Geoghegan Quinn. There was one Second class, one First class, two Senior Infant classes and two Junior Infant classes.
In 1974 the Senior School opened using classrooms just completed in what is now the Junior School. In July 1975 the Senior School pupils and teachers moved into their own section of the school. Mr. Richard Burke T.D., Minister for Education, officially opened the new schools, and Most Rev. Dr. Michael Browne, Bishop of Galway, blessed the new complex on September 26th.