Deer Park, MissouriDeer Park is an unincorporated community in Boone County, in the U.S. state of Missouri. It is located south of Columbia on U.S. Route 63.HistoryA post office called Deer Park was established in 1886, and remained in operation until 1907. The community was named for the abundance of deer in a nature reserve park near the original town site. It is near the present day Three Creeks Conservation Area.