Ullswater 'Steamers' is a boat company which provides leisure trips on Ullswater in the north-eastern part of the English Lake District. It is based in Glenridding, Cumbria. Founded in 1855, it currently operates five diesel powered vessels between four locations on the lake. The oldest boat in its fleet was launched in 1877.

Ullswater is a glacial lake in Cumbria, England and part of the Lake District National Park. It is the second largest lake in the region by both area and volume, after Windermere. The lake is about 7 miles (11 km) long, 0.75 miles (1 km) wide, and has a maximum depth of 63 metres (207 ft). Its outflow is River Eamont, which meets the River Eden at Brougham Castle before flowing into the Solway Firth. The lake is in the administrative county of Westmorland and Furness and the ceremonial county of Cumbria.