This is a list of the tallest buildings in the City and County of Denver, Colorado, United States. The tallest building in Denver is the 56-story Republic Plaza, which rises 717 ft and was completed in 1984. It stands as the 137th-tallest building in the United States, and the tallest building in the State of Colorado. The second-tallest skyscraper in the city and the state is 1801 California Street, which rises 709 ft. 29 of the 30 tallest buildings in Colorado are located in Denver.

Background

The history of skyscrapers in Denver began with the completion of the Equitable Building in 1892; this building, rising 143 ft and nine floors, was the first high-rise in Denver. The title of the city's "first skyscraper" is usually given to the Daniels & Fisher Tower, which rises 325 ft and was completed in 1910. The city went through a large building boom that lasted from the early 1970s to the mid-1980s. During this time, 21 of the city's 27 tallest buildings were constructed, including Republic Plaza, 1801 California Street, and the Wells Fargo Center. The city is the site of eight skyscrapers over 492 ft in height, including two which rank among the tallest in the United States. Overall, the skyline of Denver is ranked (based upon existing and under construction buildings over 492 ft tall) second in the Mountain States (after Las Vegas) and seventeenth in the United States. The tallest building recently completed in Denver is the Four Seasons Hotel and Tower, which rises 45 stories and 641 ft. It now stands as the fourth-tallest building in Denver as well as the city's tallest residential tower. The 1144 Fifteenth office tower rises just over 600 feet at over 40 stories making it the fifth-tallest building in Denver upon completion early 2018. Denver is currently experiencing a mid-high rise residential building boom with several large projects under construction throughout the city and more than 20 new projects breaking ground downtown Denver, golden triangle and RINO in 2023.

Tallest buildings

This lists ranks Denver skyscrapers that stand at least 300 ft tall, based on standard height measurement. This includes spires and architectural details but does not include antenna masts. The "Year" column indicates the year in which a building was completed. --- Per a ruling by the Council on Tall Buildings and Urban Habitat, freestanding observation towers are not considered to be buildings, as they are not fully habitable structures. The Elitch Garden Observation Tower, and Denver International Airport Tower are included in this list for comparative purposes. = Building height ranking is tied with another building.

Under construction

This lists buildings that are under construction in Denver and are planned to rise at least 91.5 m.

Proposed, under design review, or approved

This lists buildings that are either proposed, actively under design/site review (concept or site development), or approved and awaiting construction with the City & County of Denver, and that are planned to rise at least 91.5 m.

Timeline of tallest buildings

This lists buildings that once held the title of tallest building in Denver.