The county was organized January 29, 1830, becoming effective April 1, 1830. The county is named after the St. Joseph River that runs through the county. The St. Joseph River is named after Joseph, husband of St. Mary, the mother of Jesus.
The county was organized January 29, 1830, becoming effective April 1, 1830. The county is named after the St. Joseph River that runs through the county. The St. Joseph River is named after Joseph, husband of St. Mary, the mother of Jesus.