Septimus Drummond Lambert (3 August 1876 – 21 April 1959) was an Irish cricketer. A right-handed batsman and wicket-keeper, he played 14 times for the Ireland cricket team between 1896 and 1921, including seven first-class matches. Lambert was educated at Rathmines School and Wesley College in Dublin and at St John's College in Preston before qualifying as a solicitor in Dublin.