In the U.S. Army, Air Force and Marine Corps, a lieutenant colonel is a commissioned officer superior to a major and inferior to a colonel. In the U.S. Navy, the rank of commander is comparable to the rank of lieutenant colonel. The insignia for all four positions is a silver oak leaf.

In the British Army and Royal Marines, a lieutenant colonel wears a crown above a pip. The crown has varied in the past with different monarchs; the current one being the Crown of St Edward.

See also

• Comparative military ranks
• U.S. Army officer rank insignia
• British Army officer rank insignia