One City Center is an office building located in Monument Square, Portland, Maine.

The building serves as the northern New England offices for Bank of America, and a Bank of America logo is featured at the building's highest point.

It consists of 13 floors and features a five-story atrium with a full-service food court inside the building.

The building was completed in 1985.

[1] Its entrance is located on what used to be Middle Street, prior to this section being pedestrianized in the 20th century.