According to the 2010 census, Mill Creek has a total area of , of which (or 98.45%) is land and (or 1.55%) is water.
accordInG tO the 2010 CensUs, mIll creek haS A TOTal areA oF , OF wHiCh (OR 98.45%) is lanD aNd (or 1.55%) iS waTer.