| Country | Flag description |
| Cape Verde | five unequal horizontal bands; the top-most band of blue - equal to one half the width of the flag - is followed by three bands of white, red, and white, each equal to 1/12 of the width, and a bottom stripe of blue equal to one quarter of the flag width; a circle of 10, yellow, five-pointed stars, each representing one of the islands, is centered on the red stripe and positioned 3/8 of the length of the flag from the hoist side |
| Cayman Islands | blue, with the flag of the UK in the upper hoist-side quadrant and the Caymanian coat of arms centered on the outer half of the flag; the coat of arms includes a pineapple and turtle above a shield with three stars (representing the three islands) and a scroll at the bottom bearing the motto HE HATH FOUNDED IT UPON THE SEAS |
| Central African Republic | four equal horizontal bands of blue (top), white, green, and yellow with a vertical red band in center; a yellow five-pointed star to the hoist side of the blue band |
| Chad | three equal vertical bands of blue (hoist side), yellow, and red note: similar to the flag of Romania; also similar to the flags of Andorra and Moldova, both of which have a national coat of arms centered in the yellow band; design was based on the flag of France |
| Chile | two equal horizontal bands of white (top) and red; a blue square the same height as the white band at the hoist-side end of the white band; the square bears a white five-pointed star in the center representing a guide to progress and honor; blue symbolizes the sky, white is for the snow-covered Andes, and red represents the blood spilled to achieve independence note: design was influenced by the US flag |
| China | red with a large yellow five-pointed star and four smaller yellow five-pointed stars (arranged in a vertical arc toward the middle of the flag) in the upper hoist-side corner |
| Christmas Island |  territorial flag; divided diagonally from upper hoist to lower fly; the upper triangle is green with a yellow image of the Golden Bosun Bird superimposed, the lower triangle is blue with the Southern Cross constellation, representing Australia, superimposed; a centered yellow disk displays a green map of the island note: the flag of Australia is used for official purposes |
| Clipperton Island | the flag of France is used |
| Cocos (Keeling) Islands | the flag of Australia is used |
| Colombia | three horizontal bands of yellow (top, double-width), blue, and red note: similar to the flag of Ecuador, which is longer and bears the Ecuadorian coat of arms superimposed in the center |