John Lyon-Dalberg-Acton, 3rd Baron Acton

John Emerich Henry Lyon-Dalberg-Acton, 3rd Baron Acton, CMG, MBE, TD, DL (15 December 1907 – 23 January 1989) was a British Peer. The son of Richard Lyon-Dalberg-Acton, he succeeded to the barony upon the death of his father.

He married Daphne Strutt (d.2003), daughter of Robert Strutt, 4th Baron Rayleigh on 25 November 1931. The couple had the following children:

• Hon. Pelline Margot Lyon-Dalberg-Acton (b. 24 December 1932)
• Hon. Charlotte Lyon-Dalberg-Acton (1934–1935)
• Hon. Catherine Lyon-Dalberg-Acton (b. 30 December 1939)
• Sir Richard Gerald Lyon-Dalberg-Acton, 4th Baron Acton (b. 30 July 1941 — d. 10 October 2010)
• Reverend Canon Dr John Charles Lyon-Dalberg-Acton (b. 26 January 1943)
• Hon. Robert Peter Lyon-Dalberg-Acton (b. 23 June 1946)
• Hon. Jill Mary Joan Lyon-Dalberg-Acton (b. 15 June 1947)
• Dr Edward David Joseph Lyon-Dalberg-Acton (b. 4 February 1949)
• Hon. Peter Hedley Lyon-Dalberg-Acton (b. 27 March 1950)
• Hon. Mary Anne Lyon-Dalberg-Acton (b. 30 March 1951)
• Hon. Jane Lyon-Dalberg-Acton (b. 25 January 1954)