The American Security and Trust Company Building is a Neoclassical bank office in Washington, D.C., designed by the architectural firm of York and Sawyer.

Although the exterior has two rows of windows, the interior is a single floor, also decorated in the neoclassical style; it was remodeled in 1931–1932 but retained essentially the same form except for the removal of a pair of balconies and new openings into the adjoining annex which was constructed at the same time to the north.

The building exterior is constructed of granite ashlars with deep horizontal joints at the corners, creating a striped effect; the interior is largely faced in various marbles.

The design was praised in the banking press and featured in The American Architect and Building News in 1905.

[1] The building now houses a branch of Bank of America as a result of the latter's merger with NationsBank, which purchased MNC Financial in 1993.