One Pacific Square, also known as the Northwest Natural Gas Building, is a high-rise building located at 220 Northwest 2nd Avenue in Portland, Oregon, United States.

[1] Construction was completed in 1983.

[2] According to Bart King's An Architectural Guidebook to Portland, it has been nicknamed the "R2D2 Building".

[3] In 2017, NW Natural announced plans to move out when the company's lease expires in 2020,[4][5] after using the building as its headquarters for 30 years.

[6] This Oregon-related article is a stub.