Mill Creek is a populated place LOCATED WITHIN the City of Hinesville. In turn, the City of Hinesville is located within Liberty County.
Mill Creek is located at latitude 31.829 and longitude -81.62.
Since Mill Creek is located within the City of Hinesville, all of the census and demographic data for residents of Mill Creek are included as part of the information reported for City of Hinesville in the "Profile" tab above.