Edderside is a hamlet in the civil parish of Holme St Cuthbert in Cumbria, United Kingdom.

On nearby Salta Moss, a Bronze Age rapier was discovered in the 1980s, and may have been crafted as early as 1100BC, proving the area was inhabited at least by that time.

This section of the west Cumbrian coastline was fortified by the Romans during this period, as a series of milefortlets were constructed to guard the Solway coast beyond the western end of Hadrian's Wall.

[6] Following the dissolution of the monasteries in the 1530s, records from Holmcultram Abbey in Abbeytown showed Edderside paid an annual tithe of six large baskets of meal.

By the mid-19th century, Edderside was considered to be a wealthy settlement, at least by the standards of the area, with a single estate in the early 1880s being worth at least £10,000.

She sank off the coast of South Africa in 1919, having left the port of Durban bound for Buenos Aires with a cargo of coal, but collided with another vessel in dense fog.

[12] The village of Allonby has several hotels and restaurants, a leisure centre with a swimming pool,[13] and Twentyman's, a small shop.

[14] On the B5300 coast road, a mile-and-a-half to the south-west of Edderside, a bus service runs approximately once every two hours north to Silloth-on-Solway and south to Maryport.