The 91st Street station was constructed for the Interborough Rapid Transit Company (IRT) as part of the city's first subway line, which was approved in 1900. Construction of the line segment that includes the 91st Street station started on August 22 of the same year. The station opened on October 27, 1904, as one of the original 28 stations of the New York City Subway. The station was closed on February 2, 1959, as a result of a platform lengthening project at the two adjacent stations, 86th Street and 96th Street.