Oklahoma Natural Gas Company Building, commercieel gebouw in Oklahoma, Verenigde Staten van Amerika

The Oklahoma Natural Gas Company Building is a commercial structure located at 624 South Boston Avenue in Tulsa. Built around 1925 using reinforced concrete and buff-colored brick, it features limestone cladding on its lower two stories and is characterized by tall vertical piers extending from ground to roof with narrow windows set between them.

Designed by Frank V. Kirshner and Arthur M. Atkinson, the building was one of Tulsa's first Art Deco structures, and its acceptance by a conservative utility helped make the style common in the city. In 1982 ONEOK, successor to Oklahoma Natural Gas, dropped a plan to demolish it for a new high-rise and instead took over a tower Citgo was building at Fifth Street and Boulder Avenue. It was listed on the National Register of Historic Places on April 10, 1984, for architectural significance and as evidence of Tulsa's growth in the 1920s.

The building's name comes from Oklahoma Natural Gas, the utility that commissioned it. Its Art Deco design, chosen by a conservative utility alongside the Public Service of Oklahoma Building, made the style acceptable in Tulsa, where many Art Deco buildings followed. It is a contributing structure in the Oil Capital Historic District.

The building sits in downtown Tulsa and is easily accessible on foot while exploring the historic area. It was added to the National Register of Historic Places in 1984 and is part of the Oil Capital Historic District, meaning its exterior is protected from major changes.

In 1982 ONEOK dropped a plan to replace the building with a new high-rise headquarters and instead took over a tower Citgo was then building at Fifth Street and Boulder Avenue. The structure was listed on the National Register of Historic Places on April 10, 1984, both for its architecture and as evidence of Tulsa's growth in the 1920s, and it counts as a contributing structure in the Oil Capital Historic District.