There have been two Baronetcies created for persons with the surname Lucas, one in the Baronetage of England and one in the Baronetage of the United Kingdom.

The Lucas Baronetcy, of Fenton in the County of Lincoln, was created in the Baronetage of England on 20 May 1644 for Gervase Lucas. He fought as a Royalist in the Civil War

English Civil War

The English Civil War was a series of armed conflicts and political machinations between Parliamentarians and Royalists...

 and served as Governor of Bombay from 1666 to 1667. The title became extinct on his death in c. 1668.

The Lucas Baronetcy, of Ashtead Park in the County of Surrey and of Lowestoft in the County of Suffolk, was created in the Baronetage of the United Kingdom on 25 July 1887 for Thomas Lucas. As of 2007 the presumed fifth and present Baronet has not successfully proven his succession and is therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant. For more information, follow this link.

Lucas Baronets, of Ashtead Park and of Lowestoft (1887)

• Sir Thomas Lucas, 1st Baronet (1822-1902)
• Sir Arthur Lucas, 2nd Baronet (1853-1915)
• Sir Edward Lingard Lucas, 3rd Baronet (1860-1936)
• Sir Jocelyn Morton Lucas, 4th Baronet (1889-1980)- a Conservative
  Conservative Party (UK)
  The Conservative Party, formally the Conservative and Unionist Party, is a centre-right political party in the United Kingdom that adheres to the philosophies of conservatism and British unionism. It is the largest political party in the UK, and is currently the largest single party in the House...
  
  MP.
• Sir Thomas Edward Lucas, 5th Baronet (b. 1930)