Keller is located in Tarrant County, Texas. In 2009, it was ranked 7th in Money Magazine’s list of best cities to live in the United States. It is a northern suburb of the city of Fort Worth and is part of the Dallas–Fort Worth metroplex. The population was 39,627 at the 2010 census.

According to a 2007 estimate, the median income for a household was $107,518, and the median income for a family was $114,542. Males had a median income of $66,969 versus $34,661 for females. The per capita income for the city was $31,986. About 1.0% of families and 1.4% of the population were below the poverty line, including 1.4% of those under age 18 and 1.4% of those age 65 or over.