Flags of Cambodia

Kingdom of Cambodia (restored)

Who & why: UN-supervised elections in 1993, following the 1991 Paris Peace Accords that ended over a decade of civil war, restore the monarchy under King Norodom Sihanouk as a constitutional figurehead within a multiparty parliamentary system, though real political power has since remained concentrated under long-serving Prime Minister Hun Sen and, from 2023, his son Hun Manet.

What it represents: the same essential design used under the earlier 1953–1970 kingdom — blue and red bands with a white three-towered silhouette of Angkor Wat centered on red — readopted as the restored kingdom's flag.

People's Republic of Kampuchea / State of Cambodia

Who & why: Vietnam invades in December 1978 and topples the Khmer Rouge in January 1979, installing a Vietnamese-backed government under former Khmer Rouge officers who had defected; the ousted Khmer Rouge continue a guerrilla insurgency from border areas, still recognized by the UN as Cambodia's legitimate government for years afterward. The state renames itself Cambodia in 1989, and the Paris Peace Accords finally end the civil war in 1991, opening the way to the 1993 UN-supervised elections.

What it represents: Wikipedia says the FUNSK revived the Khmer Issarak flag in 1979, with the same colour pattern as the Democratic Kampuchea flag and a yellow five-towered Angkor Wat silhouette; it dates the PRK flag 1979-1989 and says that in 1989 the State of Cambodia flag's lower half became blue. The sources read do not call the silhouette gold or say the flag stayed plain red until 1993.

Democratic Kampuchea (Khmer Rouge)

Who & why: the Khmer Rouge, led by Pol Pot, take the capital Phnom Penh on 17 April 1975 and immediately begin a radical, brutal restructuring of society, forcibly evacuating cities and abolishing money, religion, and private property in pursuit of an agrarian utopia. Over the next three years and nine months, an estimated 1.5 to 2 million people — roughly a quarter of the population — die from execution, forced labor, and starvation, until Vietnam's December 1978 invasion topples the regime in January 1979.

What it represents: a plain red field with a yellow silhouette of Angkor Wat's three central towers, the temple imagery retained even by a regime that otherwise sought to erase Cambodia's existing institutions and culture.

Khmer Republic (Lon Nol)

Who & why: General Lon Nol overthrows Prince Norodom Sihanouk in a March 1970 coup, abolishing the monarchy and proclaiming the Khmer Republic amid escalating spillover from the neighboring Vietnam War, including heavy US bombing of Cambodian territory used by North Vietnamese forces. The republic proves unable to contain the growing Khmer Rouge insurgency, and Phnom Penh falls to them on 17 April 1975.

What it represents: a blue field with a red canton bearing the white silhouette of Angkor Wat and, in the upper fly corner, three white stars, the new republic's break from the kingdom's flag. This is what Wikipedia and Flags of the World both describe for 9 October 1970 to April 1975; the drawing and caption on this page, a red border and no stars, do not match them.

Kingdom of Cambodia (independence, Sihanouk era)

Who & why: King Norodom Sihanouk secures full independence from France on 9 November 1953, through a mix of diplomacy and his own "royal crusade for independence" campaign, then abdicates in 1955 to lead the country as an elected, still-dominant political figure through the following decade and a half of Cold War neutrality.

What it represents: Wikipedia and Flags of the World both say the blue-red-blue flag with Angkor Wat was adopted in 1948 (Flags of the World: 29 October 1948) and used until the Khmer Republic flag replaced it in October 1970, so it was carried through independence in 1953 rather than adopted then. The sources read do not describe the silhouette's colour or the number of towers.

French Protectorate of Cambodia

Who & why: King Norodom I accepts French protection in 1863, chiefly to check encroachment by neighboring Siam and Vietnam, and France formally folds Cambodia into French Indochina in 1887. Japan occupies the protectorate alongside the rest of Indochina from 1941, briefly installing a Japanese-backed independent government under King Norodom Sihanouk in March 1945 before French administration is restored after the war, holding on until full independence in 1953.

What it represents: Wikipedia lists Cambodian protectorate flags for 1863-1940 and 1940-1948 (described only by the colours blue, red and white), and Flags of the World says a Cambodian flag, a red field with a blue border and a white Angkor Wat, probably dates from about 1863 and was used with variations until 1948. The sources read do not say the plain French tricolour was the protectorate's flag, so the caption is not supported, and neither gives 1953 as the end of the period.

Khmer Empire (Angkor) and later decline

Who & why: Jayavarman II's self-proclamation as a universal monarch around 802 traditionally marks the founding of the Khmer Empire, which by the 12th and 13th centuries, under rulers like Suryavarman II and Jayavarman VII, builds Angkor Wat and the wider Angkor complex — then the largest pre-industrial urban settlement on Earth. Repeated wars with neighboring Ayutthaya from the 1400s onward, and the abandonment of Angkor itself in 1431, mark a long decline during which Cambodia becomes a shrinking, embattled kingdom squeezed between more powerful Siamese and Vietnamese neighbors, eventually seeking French protection in 1863.

What it represents: no securely attested flag survives from the Khmer Empire or its long post-Angkor decline; the empire expressed authority through temple inscriptions and royal iconography rather than a fixed territorial banner. Shown here honestly blank rather than invented.

Funan and Chenla (pre-Angkor kingdoms)

Who & why: the earliest known state in what is now Cambodia is recorded almost entirely through Chinese envoys' accounts: Funan, centered on the lower Mekong delta and its port of Oc Eo, appears in Chinese chronicles from the 3rd century CE, with a founding legend crediting the Indian Brahmin Kaundinya and local ruler Liuye. From the mid-6th century Funan is gradually superseded by a successor polity Chinese sources call Chenla — later split by those same sources into competing "land" and "water" factions — whose major sites include the brick temple complex of Sambor Prei Kuk (Isanapura), built under King Isanavarman I in the early 7th century. Jayavarman II's unification of these fragmented Chenla territories around 802 traditionally marks the end of this six-century span and the start of the Khmer Empire proper.

What it represents: no flag or banner survives from either Funan or Chenla, and none is likely to have existed in any modern sense; both kingdoms projected royal authority through Sanskrit inscriptions, temple architecture, and Indian-derived titles rather than a woven or painted standard. Shown here honestly blank.

World context: archaeologists have recovered Roman gold medallions from the reigns of Antoninus Pius and Marcus Aurelius at Funan's port of Oc Eo, physical evidence that Indian Ocean trade networks reached the Roman Mediterranean by the 2nd century CE; Funan's later centuries overlap the fall of the Han dynasty in China (220 CE), and Chenla's own span runs alongside the life of Muhammad and the founding of Islam in the early 7th century and the height of Tang dynasty China, Cambodia's own historical trading partner and the source of most surviving written accounts of this era.