Windsor line or Windsor lines may refer to a number of railway lines:
Staines–Windsor line, in England Slough–Windsor & Eton line, in England Windsor lines of the London and South Western Railway, in England Windsor Link Line, Salford, in England Quebec City–Windsor Corridor (Via Rail), in Ontario, Canada St Kilda – Windsor railway line, in Melbourne, Australia
See also Windsor Link Railway, a proposed line in Windsor, England Windsor and Hantsport Railway, a defunct line in Nova Scotia, Canada Windsor and Annapolis Railway, a defunct line in Nova Scotia, Canada House of Windsor, the royal house of the United Kingdom