About St. Mary/ Trinity Cluster · Mc Gregor, Iowa
St. Mary (Trinity Cluster) is a small, historic Catholic parish in the Mississippi River town of McGregor, Iowa. As part of the Trinity Cluster in the Archdiocese of Dubuque, it shares pastoral life with St. Patrick in Monona and St. Bridget in Postville under the Waukon Pastorate. The parish welcomes visitors and longtime parishioners alike for Sunday Mass, daily weekday Mass, and the sacrament of Reconciliation.
- Established
- 1855
- Patron
- St. Mary (Blessed Virgin Mary)
- Diocese
- Archdiocese of Dubuque
Why belong here
A tight-knit, river-town faith community rooted in nearly 170 years of Catholic tradition, offering reverent liturgy and a connection to the wider Trinity Cluster family.
Mass times at St. Mary/ Trinity Cluster
Weekly Mass schedule
Confession times
- Wednesday 7:15 AM – 7:30 AM before Mass
History & Heritage
St. Mary's was founded in 1855 and first gathered in a private home before building a permanent church. The parish reached its sesquicentennial in 2006, making it one of the older Catholic communities in Clayton County.
- Founded in 1855
- First services in Patrick O'Brien's home on Ann Street
- Sesquicentennial jubilee celebrated November 5, 2006
Cluster Membership
St. Mary is one of three parishes forming the Trinity Cluster in the Waukon Pastorate of the Archdiocese of Dubuque.
- St. Mary, McGregor
- St. Patrick, Monona
- St. Bridget, Postville
Sacraments & Worship
- Sunday Mass at 8:00 AM
- Wednesday Mass at 7:30 AM
- Confession Wednesday 7:15–7:30 AM before Mass