Mosling, WisconsinMosling is an unincorporated community located in the towns of Gillett and Underhill, Oconto [County, Wisconsin], United States. Mosling is located on County Highway P, west-southwest of Gillett.HistoryA post office called Mosling was established in 1897, and remained in operation until it was discontinued in 1929. Mosling was named in honor of an early merchant.