New Westville is an unincorporated community in Preble County, in the U.S. state of Ohio.
New Westville was originally called Westville, and under the latter name was platted in 1816. New Westville never fully developed after it was bypassed by the railroad to the south; by 1915 its population was estimated as 65. A post office called New Westville was established in 1840, and remained in operation until 1893.