Map of New York highlighting Chautauqua County Chautaugua County is a Southern Tier county. It is located in the very southwest corner of New York State. It borders Lake Erie to the northwest and Cattaraugus County to the east. The population of Chautauqua County was 136,409 in 2000. Retrieved from "https://fingerlakes.fandom.com/wiki/Chautauqua_County?oldid=5414" Categories: Counties Southern Tier Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.