The Lancaster Canal is a canal in the north of England, originally planned to run from Westhoughton in Lancashire to Kendal in south Cumbria (then in Westmorland). The section around the crossing of the River Ribble was never completed, and much of the southern end leased to the Leeds and Liverpool Canal, of which it is now generally considered part.

Of the canal north of Preston, only the section from Preston to Tewitfield near Carnforth in Lancashire is currently open to navigation (42 miles; 68 km), with the canal north of Tewitfield having been severed in three places by the construction of the M6 motorway, and by the A590 road near Kendal. The southern part, from Johnson's Hillock to Wigan Top Lock, remains navigable as part of the Leeds and Liverpool Canal. The planned continuation to Westhoughton was never built.