The flag of Oman consists of a vertical red stripe containing the national emblem of Oman at the hoist side and three horizontal stripes of white, red, and green. The…

The flag of South Ossetia , which is also shared with North Ossetia , consists of three horizontal stripes in white, red, and yellow. The white stripe represents moral…

The flag of Occitania ( Occitan: Bandièra d'Occitània ; Catalan: Bandera d'Occitània ; French: Drapeau d'Occitanie ) , represented by a vibrant red backgr…

The flag of Ontario ( French: Drapeau de l'Ontario ) is a distinctive red ensign adorned with the Union Flag in the canton and the shield of arms of Ontario on …

The flag of Obwalden ( German: Flagge von Obwalden ; French: Drapeau d'Obwald ) is composed of two horizontal stripes, red and white, separated by a black line, …

The flag of Ohio is a unique burgee, or swallowtail, design with three red and two white horizontal stripes and a blue triangle at the hoist. Within the blue triangle…

The flag of Oklahoma is a field of sky blue containing an Osage warrior's circular buckskin shield, made from buffalo hide, and decorated with seven eagle feather…

The flag of Oregon is a distinctive two-sided flag featuring a combination of navy blue and gold, representing the state's official colors. The obverse side showc…