Lieutenant colonel (Lt Col), is a rank in the British Army and Royal Marines which is also used in many Commonwealth countries. The rank is superior to major, and subordinate to colonel.^[1] The comparable Royal Navy rank is commander, and the comparable rank in the Royal Air Force and many Commonwealth air forces is wing commander.

Lieutenant Colonel
Lt Col insignia.
Country	United Kingdom
Service branch	British Army  Corps of Royal Marines
Abbreviation	Lt Col
NATO rank code	OF-4
Next higher rank	Colonel
Next lower rank	Major
Equivalent ranks	Commander (RN) Wing commander (RAF)

The rank insignia in the British Army and Royal Marines, as well as many Commonwealth countries, is a crown above a four-pointed "Bath" star, also colloquially referred to as a "pip". The crown has varied in the past with different monarchs; the current one being the Crown of St Edward. Most other Commonwealth countries use the same insignia, or with the state emblem replacing the crown.^[2]

In the modern British Armed forces, the established commander of a regiment or battalion is a lieutenant colonel.

From 1 April 1918 to 31 July 1919, the Royal Air Force maintained the rank of lieutenant colonel. It was superseded by the rank of wing commander on the following day.