The flag of the Bahamas has an approximately 1:2 aspect ratio. The black equilateral triangle on the left represents the unity and determination of the people of the Bahamas. The triangle is oriented toward three equal-width stripes symbolizing areas of natural resource; two aquamarine stripes at the top and bottom of the flag representing the sea and one gold stripe representing the land. The flag was adopted on July 10, 1973. The civil ensign is a red ensign with a white cross throughout and the national flag in the upper-hoist corner; the naval ensign is a white ensign with the same canton.

The civil ensign (also known as merchant flag or merchant ensign) is the national flag flown by civil ships (merchant ships and others, as opposed to military) to denote nationality. Countries may have a national flag for most purposes on land, a distinct civil ensign for non-military ships, and a naval ensign for the navy; sometimes two or all of these flags are identical. In most countries there was originally no distinction between the flag for armed state ships (navy) and private owned, usually unarmed ships (merchant marine). Today many countries, including the USA and France, continue the practice of having a single national flag for all or most purposes. In other countries a distinction is made between the land flag and the civil and naval ensigns. Most notable for the elaborate flag system is the United Kingdom, that uses the Union flag on land, (inter alia) the Red Ensign for merchant ships, and the White Ensign for the Royal Navy.