The society exists to "promote, encourage, foster" the combined studies of genealogy, history, custom and archaeology, within the boundaries of the non-metropolitan county of Cumbria (which, as well as the two titular historic counties of Cumberland and Westmorland, includes elements of historic Yorkshire and Lancashire).
[1] The society was established in Penrith, Cumbria on 11 September 1866, with "five business and professional men from both counties" as founder-members.
One of the society's first official acts was to campaign for the protection of the Dunmail Raise cairn, and to organise an archaeological dig on the Low Borrow Bridge Roman fort, near Tebay.
[2] The society returned to the Low Borrow Bridge site, by then a scheduled monument, in 2011 and discovered further evidence as to the size of the camp,[3] while in 2015 it was a joint funder of work into a dendrochronological dating on Kendal's fourteenth-century Castle dairy.
[4] A publishing arm was created in 1877,[2] and by 2015 was responsible for publishing its peer-reviewed journal The Transactions of the society, a triannual newsletter, and various dedicated book series for specific areas of interest (for example, the Extra Series, and those for Records, Research, and Tracts).