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 feet (219 m) and was completed in 1984.[1] 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 feet (216 m).[2] 29 of the 30 tallest buildings in Colorado are located in Denver.[3]