Arapahoe County had 17.2 percent population growth between 2000 and 2010 census years.  There is a total population of 572,003.  The county has five county commissioners and the boundaries have been redrawn to reflect 114,400 people per district.  The complete news release outlines the rough boundaries and lists the commissioner and is available at:

http://www.arapahoevotes.com/wp-content/uploads/2011/09/commissioner_districts_2011_final.pdf

Map of Arapahoe County Commissioner Districts (5 districts) redrawn and approved in 2011:

http://www.co.arapahoe.co.us/General/2011%20Commissioners%20w%20Jurisdictions%2011x17.pdf

Refer to the Arapahoe County page and the "What's New" column at:

http://co.arapahoe.co.us/