Glendale is a city in Maricopa County, Arizona, USA, located about nine miles northwest from Downtown Phoenix. According to 2006 Census Bureau estimates, the population of the city is 246,531. The NHL's Phoenix Coyotes and NLL's Arizona Sting began playing in Glendale when Jobing.com Arena (formerly the Glendale Arena) opened in December 2003. Also in Glendale is the new University of Phoenix Stadium, home of the NFL's Arizona Cardinals and the Tostitos Fiesta Bowl, which opened in August 2006. In 2008, Super Bowl XLII was played there when the Giants faced the Patriots. Both venues are part of the Westgate City Center development plan, meant to spur growth in the sparsely inhabited Yucca district.

Glendale bills itself as “Arizona’s Antique Capital,” with support for its claim from both Sunset Magazine (blank">2004) and a 1998 article in USA Today. Glendale is home to the popular Arrowhead Towne Center mall in the northwest part of the city. Glendale also is home to the metro Phoenix area's first medical school, Midwestern, as well as a major post-graduate international business school, the _Thunderbird School of Global Management.

The city will host an extension of the Valley Metro light rail transit line by perhaps 2011.

Glendale, along with other West Valley cities such as Peoria and Avondale, has had a long standing rivalry with cities in the East Valley. With the addition of the stadiums and Westgate development, as well as the Cibola Vista resort and other upscale developments, Glendale and Peoria are fast gaining a reputation as representing the future of the Phoenix area.