The City of Glendale is a home rule municipality located in an exclave of Arapahoe County, Colorado, United States. Situated as an enclave within the City and County of Denver, it serves as a distinct local government entity while remaining geographically surrounded by its larger neighbor. The city is part of the Denver-Aurora-Centennial Metropolitan Statistical Area and lies within the Front Range Urban Corridor, positioning it centrally in the region's dense urban development.

The area's history traces back to 1859 when the Cherokee Trail passed through the Cherry Creek Valley, featuring the Four Mile House as a stage stop and stock ranch. The name Glendale was first documented with the Glendale Grange organized in December 1896, later solidified by William Harold Baumert’s Glendale Farm Dairy in 1902. The Town of Glendale was officially incorporated on January 8, 1952, driven by citizens' desire to maintain independence from Denver annexation.

Glendale is defined by its high density and commercial development, including office and residential high rises that utilize much of its limited 365-acre space. Infinity Park serves as a major landmark, hosting the municipal U.S. Rugby Stadium and a high-altitude training center. Nearby, Four Mile Historic Park preserves metropolitan Denver's oldest house, a National Register site that once served travelers on the Cherokee Trail before becoming a museum and events center.

The city offers diverse cultural and recreational attractions, including the Cherry Creek Trail, Creekside Park, and Mir Park. Infinity Park hosts premier rugby venues and national championship matches, drawing sports enthusiasts to the region. While the former Celebrity Sports Center closed in 1994, the area retains entertainment value through its event centers and proximity to Denver’s amenities, supported by a strong community focus on public spaces and sports facilities.

As of the 2020 United States census, Glendale had a population of 4,613 residents. The city maintains a high median age of 30.2 years with a significant renter population, many living in units built during the 1970s. Fire and medical services are contracted from Denver, while the Glendale Police Department handles local law enforcement. The community is served by the Cherry Creek School District 5, providing education from preschool through high school levels.