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As part of its development, what is now the Flushing Line was extended one stop East, from Vernon–Jackson Avenues, which opened in 1915, to Hunters Point Avenue on February 15, 1916. Later that year it would again be extended to Court Square–23rd Street station.
The city government took over the IRT's operations on June 12, 1940. The IRT routes were given numbered designations in 1948 with the introduction of "R-type" rolling stock, which contained rollsigns with numbered designations for each service. The route from Times Square to Flushing became known as the 7. In 1949, the New York City Board of Transportation announced that the Flushing Line platforms would be lengthened to 11 IRT car lengths; the platforms were only able to fit nine 51-foot-long IRT cars beforehand. The platforms at the station were extended in 1955–1956 to accommodate 11-car trains. However, nine-car trains continued to run on the 7 route until 1962, when they were extended to ten cars.
This station is the easternmost (railroad north) underground station on the Flushing Line until the northbound terminal station (Flushing – Main Street). The tunnel portal is at the eastern end of the station. Just outside the portal is a diamond crossover linking the two tracks.
This station has two tracks and two side platforms. Its architecture is in an Italianate design of brown color. Tilework includes a trimline with "HP" tiles on it and name tablets reading "HUNTERS POINT AVE." in gold serif font. The platform columns also have a trim line with "HP" tiles below them.
Exits
This station has one fare control area above the platforms and tracks near the north end. Two staircases from each platform go up to a waiting area/crossover, where a turnstile bank and several exit–only turnstiles provide access to and from the station. Outside fare control, there is a token booth and one staircase going up to the north side of 49th Avenue with 21st Street several hundred yards to the west. Two other staircases to the east go up to the north side of the same street and is near the Long Island Rail Road's Hunterspoint Avenue station.
On October 29, 1982, a public hearing was scheduled concerning the planned closure of the entrance leading to the southeast corner of 49th Avenue and 21st Street as part of the New York City Transit Authority's Station Modernization Program.
"Transit Unification Completed As City Takes Over I. R. T. Lines: Systems Come Under Single Control After Efforts Begun in 1921; Mayor Is Jubilant at City Hall Ceremony Recalling 1904 Celebration". New York Herald Tribune. June 13, 1940. p. 25. ProQuest1248134780.
Friedlander, Alex; Lonto, Arthur; Raudenbush, Henry (April 1960). "A Summary of Services on the IRT Division, NYCTA" (PDF). New York Division Bulletin. 3 (1). Electric Railroaders' Association: 2–3. Archived (PDF) from the original on September 14, 2020. Retrieved January 27, 2021.
"37 Platforms On Subways To Be Lengthened: All Stations of B. M. T. and I.R.T.in Queens Included in $5,000,000 Program". New York Herald Tribune. November 20, 1949. p. 32. ISSN1941-0646. ProQuest1325174459.
Note: Service variations, station closures, and reroutes are not reflected here. Stations with asterisks have no regular peak, reverse peak, or midday service on that route. See linked articles for more information.
Stations and line segments in italics are closed, demolished, or planned (temporary closures are marked with asterisks). Track connections to other lines' terminals are displayed in brackets. Struck through passenger track connections are closed or unused in regular service.