The Royal Commission on London Squares, also known as the Londonderry Commission, was a royal commission created in 1927 regarding the urban open spaces of London, England. Its report in 1928 led to the enactment of the London Squares Preservation Act 1931 (21 & 22 Geo. 5. c. xciii).
The terms of reference of the commission were:
The commission was chaired by Charles Vane-Tempest-Stewart, the Marquess of Londonderry.