1 Columbia Place

1 Columbia Place, originally named the Columbia Centre, is an office building in San Diego, California. It is the 18th tallest building in San Diego and a prominent fixture in the city's skyline. Atop the skyscraper is a flagpole flying the largest United States flag in the San Diego skyline.

It is 379 ft high and is located in the Core district of downtown San Diego. It occupies the full block between West A Street, West B Street, Columbia Street and State Street. It has 27 stories above ground and three below ground.

The steel-and-glass building utilizes the modern architectural style and has a six-story atrium. Built in 1982 by developer Doug Manchester, it was renovated in 1993 and 1997. In 2004 it was designated an Energy Star building.