Harris is a town located in Marquette County, Wisconsin. According to the 2000 census, the town had a total population of 729. The unincorporated community of Harrisville is located in the town. Both the community and the town were named for James Harris, who became the first postmaster when the community's post office opened in March 1851. The village …Harris is a town located in Marquette County, Wisconsin. According to the 2000 census, the town had a total population of 729. The unincorporated community of Harrisville is located in the town. Both the community and the town were named for James Harris, who became the first postmaster when the community's post office opened in March 1851. The village of Westfield is adjacent to the town.