1 definition found watsontown - U.S. Gazetteer (1990) : Watsontown, PA (borough, FIPS 81616) Location: 41.08468 N, 76.86463 W Population (1990): 2310 (1017 housing units) Area: 1.8 sq km (land), 0.6 sq km (water) Zip code(s): 17777