 havana is a city in mason county, illinois, united states. the population was 3,577 at the 2000 census, and 3,260 at a 2009 estimate. it is the county seat of mason county. ==history== havana was named after havana, the capital of cuba.{{cite book | url=http://books.google.com/books?id=9v1iaaaamaaj&pg=pa152#v=onepage&q&f=false | title=the origin of certain place names
Cities_in_Illinois Cities_in_Mason_County,_Illinois County_seats_in_Illinois