 blanchester is a village in clinton and warren counties in the u.s. state of ohio. the population was 4,243 at the 2010 census. ==history== blanchester was laid out in 1832 by joseph and john blancett.{{cite book | url=http://books.google.com/books?id=6dyyaqaamaaj&pg=pa287#v=onepage&q&f=false | title=history of clinton county, ohio: its people, industries, and institutions | publisher=b.f. bowen | author=brown, albert j. | year
Villages_in_Clinton_County,_Ohio Villages_in_Ohio Villages_in_Warren_County,_Ohio