The station was opened in 1954 and designed by Charles B. Dolphin. It was originally named "Bloor", and connected with a pair of enclosed platforms in the centre of Bloor Street to allow interchange with Bloor streetcars within the fare-paid zone. When the streetcars were replaced with the Bloor-Danforth subway in 1966, the station began to be shown on maps as "Bloor–Yonge". However, actual platform signs still show "Bloor" on the Yonge–University line and "Yonge" on the Bloor–Danforth line, following a naming style common in New York subway station complexes, where only the platform's cross street is shown on the platform signs.