|Adopted||During the American Revolution|
|Design||White crescent, and the word liberty, in dark blue|
The Moultrie Flag, also known as the Liberty Flag, was a flag flown in the American Revolutionary War.
The Liberty flag was designed, by commission, in 1775 by Colonel William Moultrie, to prepare for war with Great Britain.
It was flown by his troops in the successful defense of Sullivan's Island against the British fleet in June 1776.
During the battle, the flag was shot away, but Sergeant William Jasper ran out in the open and hoisted it again, rallying the troops until a new stand could be provided. The story of this event, along with the pivotal role of the battle itself, earned the flag the affection of the Patriot faction in South Carolina, as well as cementing it as a symbol of liberty in the South, and the new confederacy in general.
It therefore became the standard of the South Carolina Patriot militia, and when the war ended with the liberation of Charleston, on December 14, 1782, it was presented by General Nathanael Greene's "Southern Continental & Militia Army," as the first American flag to be displayed in the South.
The symbol in the top left corner of the flag is a crescent. Some say it is a gorget, others say it is a crescent moon, but all texts from the time describe it as simply a "crescent".
Iconic to the state of South Carolina as a symbol of freedom and the Revolution, eventually this was used as the foundation for the state's own flag. The fort was renamed Fort Moultrie, and the flag is sometimes referred to as the Fort Moultrie Flag. It is occasionally rendered with the word liberty separately in white, along the lower center of the flag.
The flag is flown by the USS Paul Hamilton (DDG-60) to honor the ship's namesake Paul Hamilton, a South Carolinian who was a Revolutionary War soldier, the United States’ third Secretary of the Navy, and the 42nd governor of South Carolina. 
- "Flags of the American Revolution". www.foundingfathers.info. Retrieved Aug 7, 2020.
- "The Moultrie Flag Historical Marker". www.hmdb.org. Retrieved Aug 7, 2020.
- "Historical Flags of Our Ancestors - American Revolutionary War Flags". www.loeser.us. Retrieved Aug 7, 2020.
- "Moultrie Flag (U.S.)".
- Keller, Jared (19 Oct 2020). "We salute the USS Paul Hamilton for flying a Revolutionary War battle flag on its way back to port". Task & Purpose. Recurrent Ventures. Retrieved 26 Jun 2023.
- Media related to Moultrie Flag at Wikimedia Commons