During the period 2005 through 2009, housing unit vacancy rates varied widely from 10% in Androscoggin County to over 46% in Washington County. This represents a slightly decreased disparity compared to the 2000 Census range for Maine, which was from 8.6% to 47.2%.
Sources:
Year 2000 map – http://factfinder.census.gov/servlet/ThematicMapFramesetServlet?-geo_id=04000US23&-tm_name=DEC_2000_SF1_U_M00200&-ds_name=DEC_2000_SF1_U
2005-2009 map: http://factfinder.census.gov/home/saff/main.html?_lang=en