The Coastal Fleet^[2] (Swedish: Kustflottan, Kfl) was until 1994 a Swedish Navy authority with the main task of training the naval ships commanders and crews.^[3] After the formation of the authority Swedish Armed Forces in 1994, the Coastal Fleet remained as a unit until 2000.

The Coastal Fleet was the operational unit within the Swedish Navy, created from the combat forces capable of maritime operations. The Coastal Fleet was intended to serve as the mobile naval defence or battle group, encompassing all naval warfare capabilities such as artillery, torpedoes, and mines. It was designed to be capable of countering hostile actions along the Swedish coastlines independently of local defence tasks. According to a decision in 1948, the Coastal Fleet would primarily consist of two squadrons, each with cruisers, destroyers, and large motor torpedo boats, along with a submarine and a mine flotilla. Additionally, on the Swedish West Coast, there would be a squadron of surface vessels and a submarine flotilla.^[4]

The command flag of the last Commander-in-Chief of the Coastal Fleet, Vice Admiral Frank Rosenius, was lowered on 30 June 1998.^[5]

The Swedish Navy's ships were prepared for expeditions during the summer months and organized into temporary squadrons under the command of the 'highest commander' (högste befälhavare). In 1904, an Inspector of Naval Exercises at Sea (Inspektör för flottans övningar till sjöss) was added, also serving as the highest commander of the coastal squadrons. Starting in 1909, the squadrons began to be referred to as coastal fleets. From 1919 onwards, the positions of Highest Commander and Inspector of Naval Exercises at Sea were merged (SFS 1918:868), and the position of Highest Commander of the Coastal Fleet (Högste befälhavaren för kustflottan) was established, changed in 1931 to Commander-in-Chief of the Coastal Fleet (Chefen för kustflottan).^[8]