21st Street may refer to:
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21st Street (IND Crosstown Line)
The 21st Street station (signed as 21st Street–Van Alst) is a station on the IND Crosstown Line of the New York City Subway. Located at the intersection of 21st Street and Jackson Avenue in the Hunters Point section of Long Island City, Qu ...
, a station of the New York City Subway serving the train
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21st Street (Muni), a station on the San Francisco Municipal Railway light rail network's J Church line
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21st Street – Queensbridge (IND 63rd Street Line), a station of the New York City Subway serving the train
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