Lancaster House is a mansion in the St. James's district in the West End of London.
Lancaster House may also refer to:
England Lancaster House, Manchester, an Edwardian warehouse on Whitworth Street
United States Alphabetical by state, then town John L. Lancaster House, Mountain View, Arkansas, listed on the National Register of Historic Places (NRHP) in Stone County John Lancaster House (Keene, Kentucky), NRHP-listed in Jessamine County Lancaster House (Stevensville, Montana), NRHP-listed King–Lancaster–McCoy–Mitchell House, Bristol, Virginia, NRHP-listed Judge Columbia Lancaster House, Ridgefield, Washington, NRHP-listed
See also Lancaster Block (disambiguation)