Moneta is an unincorporated community in O'Brien County, Iowa, United States. History Moneta was platted in 1901. The name Moneta is supposed to be a poetic form for the island of Anglesey. Moneta's population was 87 in 1915. References Populated places in O'Brien County, Iowa Unincorporated communities in Iowa Populated places established in 1901 1901 establishments in Iowa