The Central Wisconsin State Fair is a state fair held annually in Marshfield, Wisconsin. The Central Wisconsin State Fair Round Barn on the fairgrounds has been listed in the National Register of Historic Places since 1997. The fair should not be confused with the Wisconsin Valley Fair. See also Northern Wisconsin State Fair Wisconsin State Fair References Central Wisconsin State Fair website Central Wisconsin State Fairgrounds, Round Barn, City of Marshfield. Wisconsin State Fair - Northern Wisconsin State Fair - Northern Tourist attractions in Wood County, Wisconsin Tourist attractions in Marathon County, Wisconsin Traveling carnivals