This List of navigation authorities in the United Kingdom is a list of links to any navigation authority in the United Kingdom, relating to any navigable waterway, aqueduct, canal, navigation, river or port.

These include:

• narrow canals, broad canals, or ship canals
• rivers which have been made navigable
• the Broads
• the navigable drains of The Fens.

Examples of navigation authorities

The "Big Three"

• Canal and River Trust – charity replacing British Waterways in managing the majority of the canals and many navigable rivers^[1]
• Environment Agency – environmental regulatory body, manages its waterways as part of its water management obligations.^[2]
• Broads Authority – has status similar to other British national parks but alone amongst them also exercises a navigation function. The "Sandford Principle" as applied in other national parks does not apply here.^[3]

Other authorities

• Local authorities
• National park authorities
• Trusts

Navigation authorities in the UK

• Associated British Ports - ABP Humber^[4]
• Avon Navigation Trust (Stratford-on-Avon to Tewkesbury)^[5]
• Basingstoke Canal Authority^[6]
• Beaulieu River
• Bridgewater Canal - Manchester Ship Canal Company in conjunction with the Bridgewater Canal Trust ^[7]
• Bristol Harbour Authority
• The Canal & River Trust, formerly British Waterways - supported by grant-in-aid from Government
• Broads Authority - a national park authority
• Cambridgeshire Lodes
• Cardiff Harbour Authority
• Chesterfield Canal Partnership
• City of York Council
• Company of Proprietors of the Chelmer & Blackwater navigation
• Company of Proprietors of the Neath Canal Navigation
• Company of Proprietors of the Stroudwater Navigation
• Conservators of the River Cam^[8]
• Dart Harbour and Navigation Authority - a Trust Port, Dartmouth^[9]
• Devon County Council
• Driffield Navigation Trust^[10]
• Droitwich Canals Trust
• Environment Agency - supported by grant-in-aid from Government
• Essex Waterways Ltd - a subsidiary of the Inland Waterways Association
• Exe Estuary Navigation Authority based at Exeter
• Exeter City Council
• Gloucester Harbour Trustees - a Trust Port
• Herefordshire & Gloucestershire Canal Trust
• Hull City Council
• Inland Waterways Association subsidiary Essex Waterways Ltd
• Ipswich & Stowmarket Navigation - River Gipping Trust
• River Ivel - Environment Agency and riparian landowners
• Lake District National Park Authority
• Lancaster Canal's Northern Reaches - various ownerships
• Lapal Canal - various ownerships
• Little Ouse Navigation - Environment Agency / riparian landowners
• Loch Lomond and the Trossachs National Park Authority
• Manchester Ship Canal Company^[11] - the majority of shares are owned by Peel Ports, a subsidiary of The Peel Group.^[12]
• Medway Ports^[13]
• Middle Level Commissioners^[14]
• Neath Canal Navigation, Neath Port Talbot County Borough Council
• Port of Hull and the River Hull, Associated British Ports ^[15]
• Port of London Authority^[16]
• River Dee, Wales - Environment Agency has harbour authority responsibilities downstream
• River Glen, Lincolnshire - Environment Agency
• River Great Ouse - Environment Agency
• River Hamble Harbour Office ^[17]
• River Idle - Environment Agency
• River Medway - Non-tidal: Environment Agency; Tidal: Medway Ports
• River Severn - Avon and Wiltshire: Bristol Haven Conservancy
• River Severn, Gloucestershire/Herefordshire: Gloucester Harbour Trustees^[18]
• River Tyne - Tidal: Port of Tyne Authority; Non-tidal: various
• Scottish waterways - managed by the Scottish Executive and British Waterways Scotland (BWS)
• Sedgemoor District Council - as Harbour Authority for the Port of Bridgwater and the River Parrett^[19]
• Sleaford Navigation^[20]
• Ulster Canal - various, both in Northern Ireland and the Republic of Ireland
• Waterways Ireland
• The Waterways Trust
• The Wey & Arun Canal Trust, Wey & Arun Junction Canal
• Wey and Godalming Navigations, National Trust^[21]
• Wilts & Berks Canal Trust
• River Witham - Witham Fourth District Drainage Board ^[22]