| Country | Flag description |
| Afghanistan |  three equal vertical bands of black (hoist side), red, and green, with the national emblem in white centered on the red band and slightly overlapping the other two bands; the center of the emblem features a mosque with pulpit and flags on either side, below the mosque are numerals for the solar year 1298 (1919 in the Gregorian calendar, the year of Afghan independence from the UK); this central image is circled by a border consisting of sheaves of wheat on the left and right, in the upper-center is an Arabic inscription of the Shahada (Muslim creed) below which are rays of the rising sun over the Takbir (Arabic expression meaning "God is great"), and at bottom center is a scroll bearing the name Afghanistan |
| Akrotiri | the flag of the UK is used |
| Albania | red with a black two-headed eagle in the center |
| Algeria | two equal vertical bands of green (hoist side) and white; a red, five-pointed star within a red crescent centered over the two-color boundary note: the crescent, star, and color green are traditional symbols of Islam (the state religion) |
| American Samoa | blue, with a white triangle edged in red that is based on the outer side and extends to the hoist side; a brown and white American bald eagle flying toward the hoist side is carrying two traditional Samoan symbols of authority, a staff and a war club |
| Andorra | three equal vertical bands of blue (hoist side), yellow, and red with the national coat of arms centered in the yellow band; the coat of arms features a quartered shield note: similar to the flags of Chad and Romania, which do not have a national coat of arms in the center, and the flag of Moldova, which does bear a national emblem |
| Angola | two equal horizontal bands of red (top) and black with a centered yellow emblem consisting of a five-pointed star within half a cogwheel crossed by a machete (in the style of a hammer and sickle) |
| Anguilla | blue, with the flag of the UK in the upper hoist-side quadrant and the Anguillan coat of arms centered in the outer half of the flag; the coat of arms depicts three orange dolphins in an interlocking circular design on a white background with blue wavy water below |
| Antarctica | void |
| Antigua and Barbuda | red, with an inverted isosceles triangle based on the top edge of the flag; the triangle contains three horizontal bands of black (top), light blue, and white, with a yellow rising sun in the black band |
| Arctic Ocean | void |
| Argentina | three equal horizontal bands of light blue (top), white, and light blue; centered in the white band is a radiant yellow sun with a human face known as the Sun of May |
| Armenia | three equal horizontal bands of red (top), blue, and orange |
| Aruba | blue, with two narrow, horizontal, yellow stripes across the lower portion and a red, four-pointed star outlined in white in the upper hoist-side corner |
| Ashmore and Cartier Islands | the flag of Australia is used |
| Atlantic Ocean | void |
| Australia | blue with the flag of the UK in the upper hoist-side quadrant and a large seven-pointed star in the lower hoist-side quadrant known as the Commonwealth or Federation Star, representing the federation of the colonies of Australia in 1901; the star depicts one point for each of the six original states and one representing all of Australia's internal and external territories; on the fly half is a representation of the Southern Cross constellation in white with one small five-pointed star and four larger, seven-pointed stars |
| Austria | three equal horizontal bands of red (top), white, and red |
| Azerbaijan | three equal horizontal bands of blue (top), red, and green; a crescent and eight-pointed star in white are centered in red band |
| Bahamas, The | three equal horizontal bands of aquamarine (top), gold, and aquamarine, with a black equilateral triangle based on the hoist side |
| Bahrain | red, the traditional color for flags of Persian Gulf states, with a white serrated band (five white points) on the hoist side; the five points represent the five pillars of Islam |
| Bangladesh | green field with a large red disk shifted slightly to the hoist side of center; the red disk represents the rising sun and the sacrifice to achieve independence; the green field symbolizes the lush vegetation of Bangladesh |
| Barbados | three equal vertical bands of blue (hoist side), gold, and blue with the head of a black trident centered on the gold band; the trident head represents independence and a break with the past (the colonial coat of arms contained a complete trident) |
| Belarus | red horizontal band (top) and green horizontal band one-half the width of the red band; a white vertical stripe on the hoist side bears Belarusian national ornamentation in red |