Sunnyside is a neighborhood in the western portion of the New York City borough of Queens. It shares borders with Hunters Point and Long Island City to the west, Astoria to the north, Woodside to the east and Maspeth to the south. It contains the Sunnyside Gardens Historic District, one of the first planned communities in the United States.

The name "Sunnyside" originates with the Bragaw family, French Huguenots who had purchased the land in 1713 and named their estate "Sunnyside Hill". Sunnyside was a rural hamlet mostly consisting of small farms and marshland. It was incorporated into Long Island City in 1870 and developed into a residential community after the Queensboro Bridge was completed in 1909. A large portion of the neighborhood is six-story apartment buildings constructed during the 1920s and 1930s.

Sunnyside is located in Queens Community District 2 and its ZIP Codes are 11101, 11104, and 11377. It is patrolled by the New York City Police Department's 108th Precinct. Politically, Sunnyside is represented by the New York City Council's 26th District.