1 definition found west sayville - U.S. Gazetteer (1990) : West Sayville, NY (CDP, FIPS 80885) Location: 40.72822 N, 73.10571 W Population (1990): 4680 (1884 housing units) Area: 4.8 sq km (land), 0.0 sq km (water) Zip code(s): 11796