Colonel Francis Alfred Lucas (7 June 1850 – 11 December 1918) was a British company director and Conservative Party politician who lived in London and in Suffolk. He sat in the House of Commons from 1900 until his defeat in 1906.
Lucas was the son of Sampson Lucas, of Gloucester Square, London. He was educated privately and then at University College London, after which he went into business, becoming a partner in Lucas, Nicholls and Company, a merchants firm with operations in London, and Manchester. He was a director of both Allied Insurance and Allied Marine Insurance.
He was also an actively involved in the Volunteer Force, serving for 35 years as a member of the Artists Rifles, mostly as an officer. He then became Commander of the Harwich Voluntary Infantry Brigade from 1900 to 1906.
He was also a governor of Christ's Hospital and of Guy's Hospital, and a Justice of the Peace for Suffolk, where his country residence Easton Park was located near Wickham Market.
He unsuccessfully contested the Louth division of Lincolnshire at the 1895 general election, and at the 1900 general election he was elected as MP for Lowestoft, with a majority of over 20% of the votes. However, at the 1906 election, he was defeated by the Liberal candidate Edward Beauchamp, who won the seat with a 14% majority. Noting the scale of Liberal gains in the election, The Times noted the Lowestoft result as evidence that "apparently, no Unionist seat is now secure".