Mon Louis, AlabamaMon Louis is an unincorporated community on Mon Louis Island, in Mobile [County, Alabama|Mobile County], Alabama, United States.HistoryMon Louis is named for the nearby Mon Louis Island. The island was named by Nicholas Baudin, Sieur de Miragouin, in honor of his French native city Montlouis-sur-Loire. A post office operated under the name Mon Louis from 1890 to 1916.GeographyMon Louis is located at and has an elevation of.