The R9 was a New York City Subway car model, which was built by the American Car and Foundry Company and the Pressed Steel Car Company in 1940 for the Independent Subway System (IND) and its successors, which included the New York City Board of Transportation and the New York City Transit Authority.

[1] A total of 153 cars were built, numbered 1650–1802, and arranged as single units.

They were used primarily for increased service in Queens and the opening of the Crosstown Line.

They served exclusively on all IND lines for most of their service lives, but were also used on the BMT Division during their final years.

150 of the new cars were ordered for service on the new IND Sixth Avenue Line, which opened on December 15, 1940.