Henry Mills (1868 - 11 March 1928) was an anti-Sabbatarian and local politician in the Islington area.
An alderman of Islington Borough Council, he was Mayor of Islington 1905-06. He laid the foundation stone of Islington Library on(June 18, 1906) and opened Islington North Library on 29 September 1906. He was later a Progressive Party member of the London County Council representing Islington West 1913-1928, and served as Deputy Chairman of the London County Council for 1924–1925.
At the 1922 general election he stood as Liberal Party candidate for the parliamentary seat of Islington West, but was unsuccessful.
He was also Secretary of the National Sunday League (an organisation seeking to have museums, galleries and concert halls allowed to open on Sundays) for forty years. He died at his home in Finsbury Park and was buried in St Pancras & Islington Cemetery, East Finchley. His funerary monument was unveiled by the Home Secretary, J R Clynes, on 31 August 1929.