The T.B. Ackerson Company is a still extant real estate company that was instrumental in the development of earlier communities in Brooklyn, New York City and Brightwaters , Long Island, New York in the early 20th century.

The communities it developed included Beverly Square and Fiske Terrace in Brooklyn, and Brightwaters, which is now an incorporated village of the same name.

Its former real estate office building for Fiske Terrace is now a New York City subway station house located at the corner of Avenue H and East 16th Street, and has been designated a New York City landmark.

The surviving office of the Ackerson Real Estate Company is located on Montauk Highway in Brightwaters.