Frisco is a city in Collin and Denton Counties in the U.S. state of Texas and a wealthy and rapidly growing suburb of Dallas. As of the 2000 census, the city population was 33,714, while according to 2008 city and census estimates, the city's population has surpassed 100,000. Frisco has been and continues to be one of the fastest growing cities in the United States. In the late 1990s, the northern Dallas–Fort Worth Metroplex suburban development tide hit the northern border of Plano and spilled into Frisco, sparking explosive growth into the 2000s. Like many of the cities located in the booming northern suburbs of Dallas, Frisco serves as a bedroom community for many professionals who work in the Dallas–Fort Worth Metroplex. Since 2003, Frisco has received the designation "Tree City USA" by the National Arbor Day Foundation . In 2007, Frisco received the National Arbor Day Foundation Growth Award for the third year in a row. This award recognizes environmental improvement and encourages a higher level of tree care and tree preservation within the community. A 2007 Forbes study named Frisco as the seventh-fastest growing suburb in the United States .