Chadwick is an unincorporated community in eastern Christian County, Missouri, United States. It is located approximately six miles southeast of Sparta along Missouri Route 125. The community of Oldfield is approximately three miles to the north along Route 125. It is part of the Springfield, Missouri Metropolitan Statistical Area. Its ZIP code is 65629. Chadwick is located in the hills of the Ozarks along the south edge of the Springfield Plateau. It sits on a ridge between the East Fork of Bull Creek to the west and Swan Creek to the east.