SS Peter and Paul's Church, Catholic church building in Athlone, Ireland.

SS Peter and Paul's Church is a Roman Catholic parish church on the western bank of the River Shannon in Athlone, facing Athlone Castle. Ralph Byrne designed it in Baroque Revival style after the Basilica of Saint Paul Outside the Walls, with twin towers flanking a pedimented entrance in Portland stone and ashlar limestone. Inside are a wide nave, marble altar work, cast iron elements and stained glass by Richard King of the Harry Clarke studio.

Designed by architect Ralph Byrne in a Baroque Revival style modelled on the Basilica of Saint Paul Outside the Walls, the church was built between 1932 and 1939. Dean John Crowe led fundraising from the 1930s until his death in 1955. Its twin towers and pedimented entrance face Athlone Castle across the River Shannon.

The parish covers Athlone West and parts of County Roscommon, and is also served by St. Brigid's Church in Drum and Our Lady of the Wayside in Clonown. Dean John Crowe led the fundraising for the church from the 1930s until his death in 1955.

The church is located in central Athlone and remains open daily for prayer, with services held throughout the week. Visitors can enter during most hours of the day to see the interior or spend time in quiet reflection.

The stained glass windows were made at the Harry Clarke Studio by Richard King, showing Saint Peter, Saint Paul, Saint Patrick, the Last Judgment and Purgatory. The An Túr Gloine artist A. E. Child was consulted on the window design.