Alma Square commemorates the River Alma on whose banks the first Anglo-French victory of the Crimean War was won.
Alma was a popular name with street builders of the late 1850s after the 1854 battle of Alma. Both Alma Square and Alma Terrace (Allen Street, Kensington) were built shortly after that date.
Alma Square has an enclosed private garden, protected by the London Squares Preservation Act of 1931.