The London Borough of Hackney is a London borough in Inner London, England. The historical and administrative heart of Hackney is Mare Street, which lies 5 miles (8 km) north-east of Charing Cross. The borough is named after Hackney, its principal district. Southern and eastern parts of the borough are popularly regarded as being part of east London that spans some of the traditional East End of London with the northwest belonging to north London. Its population is estimated to be 281,120.

Hackney is a district in East London, England, forming around two-thirds of the area of the modern London Borough of Hackney, to which it gives its name. It is 4 miles (6.4 km) northeast of Charing Cross and includes part of the Queen Elizabeth Olympic Park. Historically it was within the county of Middlesex.