Garryowen or Garry Owen is an unincorporated community in Butler Township, Jackson County, Iowa, United States,[1] generally surrounding St. Patrick's Church.

It was part of a wave of Catholic settlement encouraged by Mathias Loras, Bishop of Dubuque.

His associate, missionary Samuel Charles Mazzuchelli, founded a log church there in 1840 with funds from the Society for the Propagation of the Faith.

In 1854, the congregation built a stone church, today recognized on the National Register of Historic Places.

The school closed in 1871 after the Sisters of Charity of the Blessed Virgin Mary were unable to secure funding to continue it.