Dallas is the name of a city as well as a county. The City of Dallas lies mostly in Dallas County, but has spread to or owns lakes in the neighboring counties of Collin, Denton, Kaufman and Rockwall. All in all, Dallas is in 5 separate counties.
The population of Dallas County, TX on December 15th 2011 is approximately 2,388,792. (Extrapolated from a population of 2,294,706 on May 24th 2008 and a population of 2,368,139 on February 17th...