Coppell is located in the northwest corner of Dallas County in Texas. It is a suburb of Dallas and a bedroom community in the Dallas–Fort Worth metroplex. The population was 38,659 at the 2010 census. A small area in the far northern portion of the city extends into neighboring Denton County.
According to a 2007 estimate, the median income for a household in the city was $106,783, and the median income for a family was $119,229. Males had a median income of $76,681 versus $43,750 for females. The per capita income for the city was $40,219. About 1.4% of families and 1.9% of the population were below the poverty line, including 1.9% of those under age 18 and 5.7% of those age 65 or over.