Longendale Urban District (also known as Longdendale Urban District) was, from 1936 to 1974, a local government district in the administrative county of Cheshire, England. It encompassed parts of Broadbottom, Hattersley, Hollingworth, Matley and Mottram in Longdendale, all forming part of the non-statutory Longdendale Valley.

Longendale Urban District
Longdendale UD within Cheshire in 1970
History
• Created	1936
• Abolished	1974
• Succeeded by	Metropolitan Borough of Tameside
Status	Urban district
Government	Longdendale Urban District Council

The district covered an area close to Cheshire's northeastern boundary with Derbyshire and was bound (from north to west) by the Municipal Borough of Mossley, Municipal Borough of Stalybridge, Municipal Borough of Dukinfield and Municipal Borough of Hyde. Tintwistle Rural District, from which Longendale exchanged territory in 1936, lay to the east.

The Urban District was created by the Local Government Act 1894. In 1974, Longendale Urban District was abolished by the Local Government Act 1972 and its former area was transferred to Greater Manchester to form part of the Metropolitan Borough of Tameside.