McKinney is a city in and the county seat of Collin County, Texas, and the second in population to Plano. In 2008, the U.S. Census Bureau estimated that the city's population was 115,620. The Census Bureau listed McKinney as the nation's fastest growing city from 2000 to 2003 and again in 2006, among cities with more than 50,000 people. In 2007 it was ranked second-fastest growing among cities with more than 100,000 people and in 2008 as third-fastest. McKinney is one of several fast-growing communities on the northeastern edge of the Dallas-Fort Worth Metroplex.
Both the city and county are named after Collin McKinney, a signer of the Texas Declaration of Independence, and a congressman for the Red River district of the Republic of Texas.
In the Newsweek ranking of schools throughout the nation for 2006, McKinney High School was ranked 191, out of 1000 schools on the list, while McKinney North High School was ranked 237. The original article incorrectly stated results for McKinney's two high schools, but Newsweek updated its lists by 2 June 2007. In the 2008 rankings, McKinney High School was ranked 642 out of 1300 and McKinney North High School was ranked 771.
Also in the Dallas Morning News McKinney North High School was ranked #4 in state and #3 in area for football.