  williams township is a township in northampton county, pennsylvania, united states. williams township is located in the lehigh valley region of the state. the population of williams township was 4,470 at the 2000 census. ==history== 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. presently, it is an unregistered historic place that is privately owned. ==geography== according to the united states census bureau, williams township has a total area of 18.7&nbsp;square miles (48.5&nbsp;kmÂ²), of which, 18.4&nbsp;square miles (47.6&nbsp;kmÂ²) of it is land and 0.3&nbsp;square miles (0.9&nbsp;kmÂ²) of it (1.76%) is water. it is drained by the delaware river, which separates it on the east from new jersey. interstate 78 crosses east-to-west in the north and its easton interchange is with old philadelphia road/morgan hill road in the township. [[p
Townships_in_Northampton_County,_Pennsylvania Townships_in_Pennsylvania