On July 14, 1976, Bishop Edward McCarthy officially announced the formation of a third parish in Sun City, naming it St. Elizabeth Seton Parish. Fr. Paul Smith became the founding pastor, assisted by Deacon William Tone and supported by about 300 parishioners. It was during Fr. Smith's pastorate that the decision was made to build the Church. Bennie Gonzalez, architect, designed and supervised the construction of the Church complex.

July 14, 1979 was the date of the first Mass in the new Church. Bishop James Rausch didicated the Church on Octob er 21, 1979. The Church, Hall, and Office/Rectory have served the parish well for 25 years. The parish population has grown steadily and the faith community has flourished.

St. Elizabeth's Parish celebrated its 25th Annivesary on October 21, 2001 with Bishop Thomas J. O'Brien presiding and Fr. Frank Bartel as pastor.

Rev. Frank L. Bartel retired as Pastor on April 30, 2010. On May 23, 2010 Bishop Thomas J. Olmstead installed Rev. Joseph P. McGaffin as the new Pastor of St. Elizabeth Seton Parish.