Oconto County, Wisconsin: History
First visited by French explorers in the 17th century, Oconto County is among the oldest settlements in Wisconsin. Father Claude-Jean Allouez of the Roman Catholic Jesuit order said the first Mass in Oconto. Among the first settlers was Joseph Tourtilott, who explored much of the Oconto River watershed. Oconto County was created in 1851 and organized in 1854.