834 Fifth Avenue is a luxury residential housing cooperative in the Upper East Side of Manhattan, New York City. It is located on Fifth Avenue at the corner of East 64th Street opposite the Central Park Zoo. The limestone-clad building was designed by Rosario Candela, a prolific designer of luxury apartment buildings in Manhattan during the period between World War I and World War II. 834 Fifth Avenue is widely regarded as one of the most prestigious apartment houses in New York City. It has been called "the most pedigreed building on the snobbiest street in the country’s most real estate-obsessed city" in an article in the New York Observer newspaper. This status is due to the building's overall architecture, the scale and layout of the apartments, and the notoriety of its current and past residents. It is one of the finest buildings designed by Rosario Candela, according to The New York Times.

Rosario Candela was an Italian American architect who achieved renown through his apartment building designs in New York City, primarily during the boom years of the 1920s. He is credited with defining the city's characteristic terraced setbacks and signature penthouses. Over time, Candela's buildings have become some of New York's most coveted addresses. As architectural historian Cristopher Gray has written: "Rosario Candela has replaced Stanford White as the real estate brokers' name-drop of choice. Nowadays, to own a 10- to 20-room apartment in a Candela-designed building is to accede to architectural as well as social cynosure."