Rikers Island (/ˈraɪkərz/) is a 413. 17-acre (167. 204 ha) island in the East River between Queens and the Bronx that is home to New York City's main jail complex. It is close to the runways of LaGuardia Airport. Supposedly named after Abraham Rycken, who bought the island in 1664, the island was originally under 100 acres (40 ha) in size, but has since grown to more than 400 acres (160 ha). The first stages of expansion were accomplished largely by convict labor hauling in ashes for landfill. The island is politically part of the Bronx, although bridge access is from Queens and it is included as part of Queens Community Board 1 and uses a Jackson Heights, Queens, ZIP Code of 11370 for mail.