|  Photo from Digital-Topo-Maps.com | Saint Joseph, MI 49085 Post Office Location: 205 Main Street; Saint Joseph, MI Year Post Office built: Town(s) Served: Saint Joseph Acceptable City Names: Saint Joseph Not Acceptable City Names: Saint Joe, St Joe, St Joseph Sectional Service Facility: Kalamazoo (Central) County(ies): Berrien Info on Saint Joseph: The City of Saint Joseph is on the banks of Lake Michigan and the St. Joseph River. The lighthouse at Saint Joseph claims to be the first one built on Lake Michigan, but Chicago, IL also claims to have the first built. Saint Joseph was incorporated in 1834. This is the county seat of Berrien County. | 
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