Records relating to the historic county of Westmorland, and also some for the Sedbergh-Dent district (formerly in the West Riding of Yorkshire) and for the Cartmel district (formerly in Lancashire North of the Sands). These include:
- Church of England and non-conformist church records
- Local authorities, civil Parishes, statutory bodies, schools and official records
- Businesses, industries, societies, organisations and charities
- Families, landed estates and solicitors
- Ordnance Survey maps of Westmorland and Trade Directories
Significant collections include:
- The archive of Thomas H. Mawson, landscape architect of Lancaster and Windermere, late 19th to 20th centuries (collection references WDB 76 and WDB 86)
- Lady Anne Clifford (1590-1676) of Appleby Castle records (reference WDHOTH/1/10)
- Sir Daniel Fleming of Rydal Hall papers, late 17th century (collection reference WDRY).