Legislative District 7 The Cattaraugus County Legislative District 7 represents the following municipalities: Town of Ischua (2010 Census Pop.: 859) Town of Hinsdale (2010 Census Pop.: 2,168) Town of Humphrey (2010 Census Pop.: 687) Town of Olean (Excludes City of Olean) (Census 2010 Pop.: 1,963) Town of Portville (2010 Census Pop.: 3,730) View the archived Legislative District 7 (pre-2016) Learn about the changes that occurred on January 1st, 2016 to the Cattaraugus County Legislative Districts.