 The population of Williams Township was 4,470 at the 2000 census.The Bridge in Williams Township, Jacob Arndt House and Barn, Coffeetown Grist Mill, and Isaac Stout House are listed on the National Register of Historic Places.Another historic grist mill located in Williams Township is the Wottring Mill built in 1810 by William Wottring located on a road that is named in honor of William's mill on Wottrings Mill Road.