1920. Cambria Heights begun. Named in 1924. Its major growth and development occurred during the 1930s.

1920. Jamaica Avenue received present name. Formerly the Brooklyn and Jamaica Turnpike (to Van Wyck Blvd.), Fulton Street within Jamaica, and Hempstead and Jamaica Turnpike east of 168th Street.

1923. Rego Park developed by Rego (acronym for “Real Good”) Construction Co.

1924. Sunnyside Gardens: a limited-profit housing experiment featuring block-perimeter housing restricted to 2½ stories and inside-block yard, garden, and play space. Built by City Housing Corp and designed by Clarence Stein and Henry Wright. Located in Long Island City, bounded by 43rd & 49th Streets and by 39th & Skillman Avenues.

1929. The Wall Street stock market crash on October 24 marks the beginning of the Great Depression in the United States and other countries around the world.

1929. Grand Central Air Terminal: the first airfield terminal in N.Y.C. Built on 220 acres of swampland between Northern and Astoria Boulevards, using fill from IND-Subway and Queens Boulevard excavations. Service begun March 16.

1929. Glenn-Curtiss Airport built at North Beach, displacing North Beach Amusement Park and site of 17th century Bowery Bay settlement.