Valley City, IndianaValley City is an unincorporated community in Washington Township, Harrison County, Indiana.HistoryValley City was platted in 1859. It was named for the valley in which it situated. A post office was established at Valley City in 1863, and remained in operation until it was discontinued in 1911.GeographyThe community is situated near the head of Blue Spring Hollow, east of New Amsterdam and north of Mauckport.