| Flag | Duration | Use | Name/Description |
| 1994–present | Flag of the Vietnam Electricity | Blue field with the logo of the EVN |
| 1988–present | Flag of the Vietnam Bank for Agriculture and Rural Development | Red field with the logo of Agribank, on is the text "Ngân hàng Nông nghiệp và Phát triển Nông thôn Việt Nam" |
| 1975–present | Flag of Vietnam Sea Transport & Chartering Co. | Horizontal bicolor of red over blue with a yellow "V" in the middle. Influences: |
| 1995–2007 | Flag of Falcon Shipping Company | Green field with a white letter "F" |
| 2007–present | Flag of Vietnam Oil and Gas Transportation Joint Stock Company | Green field with a red six-pointed star and the white letter "F" in the middle |
| 2006–present | Flag of Vinaship Joint Stock Co. | Sky blue flag with a "V" formed by a white bird |
| 2021–present | Flag of Viettel Group | Red flag with white Viettel typeface logo and its Vietnamese slogan. |
| Flag | Duration | Use | Name/Description |
| 1702–1705 | Flag of Poulo Condor under the English East India Company | Prior to the Acts of Union which created the Kingdom of Great Britain, the flag contained the St George's Cross in the canton representing the Kingdom of England. Influences: |
| 1863 | Flag of the Diplomatic Delegation of Annam from Red Sea to France. | Yellow field with four red word "Đại-Nam khâm-sứ". Influences: |
| 1887–1923 | Flag of French colonial empire. | A vertical tricolour of blue, white, and red. |
| 1917 | Flag of Daihung Empire. | Five red dots connected with saltire on a yellow field. |
| 1900 – 9 March 1945 | The protectorate flag of Annam and Tonkin. | French flag canton on a yellow field. Influences: |
| 1930–1931 | Flag of the Red Guards. | Flag ratio: 2:3. Influences: |
| January 15, 1931 | Flag of the Indochinese Communist Party used at Vinh, Nghệ An. | The Chữ Hán "黨共產東洋" surrounding a hammer and a sickle. Slogans: 1 ° Increase in wages, reduction of the working day, reinstatement of the 21 workers made redundant; 2 ° Punishment of the strongmen and mandarins who harm the masses. Influences: |
| 1936–1945 | Flag of the Hội Ánh Sáng. | Flag ratio: 2:3. |
| 1944–1945 | Flag of the Đại Việt Quốc gia Liên minh. | A yellow field with three red stars. |
| March 9 – August 14, 1945 | Flag of Empire of Japan. | Flag ratio: 7:10. Disc is shifted 1% towards the hoist. |
| 1945–1960 | Flag of Bình Xuyên. | A dark red banner and a small blue banner inside, a small yellow star centered on a blue banner. Influences: |
| 1947 | Cờ Quẻ Càn | A yellow field with three red stripes. The stripes formed the Quẻ Càn, or Qian trigram. Influences: |
| 2 October 1955 – 1 November 1963 | Flag of Vietnamese National Revolutionary Movement. | Flag ratio is 2:3. |
| 2 October 1955 – 1 November 1963 | Flag of Vietnamese National Revolutionary Movement. | Flag ratio is 2:3. |
| 1961–1963 | Flag of Vietnamese Republican Youth Movement. | Flag ratio is 2:3. |
| 1965–1970 | Flag of 4-T Union. | A large green four-leaf clover centered on a white field. |
| 1968–1973 | Flag of National Progressive Movement. | Two horizontal red stripes enveloping a horizontal yellow stripe. The red arrow in the middle of the yellow stripe. Influences: |
| 1951–1960 | Flag of Air Vietnam. | |
| Flag | First proposed | Name / Proposed by | Description |
| c. 1912–1925 | The Quốc kỳ Ngũ Tinh according to Tự phán, written by Phan Bội Châu. | Five red dots connected with saltire on a yellow background that is to symbolise the "yellow" race. |
| 1938–1940 | Proposed flag for Vietnam by the Vietnam National Restoration League. | The word "King" symbolises the constitutional monarchy. A red background symbolises struggle for independence. A white background symbolises "cleanliness of the people". |
| 27 May 1945 | Flag proposal for the Empire of Vietnam in 1945 by Nguyễn Huyền Tĩnh on Trung Bắc Chủ nhật. | Three large yellow stripes represent the three regions of Vietnam, while two red stripes symbolize the shared bloodline of Lạc Hồng. The ratio is 3:4. |
| 17 January 1973 | The Reconciliation Flag of Vietnam. According to the Flags of the World website the creation of this flag is attributed Nguyễn Thành Trí and Tristan Nguyễn in Saigon, South Vietnam in 1973, following the signing of the Paris Peace Accords. In the year 2007 it was later re-introduced in San Francisco, United States. | A vertical tricolour with the colours yellow-green-red and a white 12-pointed star in its centre. The colour yellow is supposed to be a symbol of both the continent of Asia and the Vietnamese people, the colour green symbolises peace, while the colour red symbolises the concept of "revolutionary enthusiasm". The white star in the centre of the flag stands for freedom, peace, and national reconciliation. The points of the star correspond to the years of the âm lịch stands for the three values of freedom, equality, and pluralism – which are the values its advocates expect to be the most respected values in a new Vietnam. The ratio is 2:3. |
| 2013 | An untitled flag proposal at a Vietnamese language website by a group of Vietnamese students from USA, Canada, and France, acknowledge the legitimacy of the current red and yellow flags of Vietnam. | The proposed flag is a horizontal tricolour with the colours white-red-white divided in the ratio of 1:2:1. |
| Flag | Supposed date | Supposed use | Description | Origin of the misattribution |
| | Flag of Cochinchina. | Likely an imperial banner featuring various Sino-Vietnamese symbols such as the thái cực đồ symbol in the form of a spiral, among other symbols, likely the Tứ tượng, Lạc thư and the constellations. |
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| 1868–1945 | Flag of French Cochinchina. | A rectangular flag with many black triangles, resembling a serrated ribbon typically found on Imperial Chinese and Vietnamese flags, surrounding a yellow interior. Likely based on an old imperial Vietnamese flag where the Europeans didn't know that the flag had a serrated ribbon and "filled it in" as a rectangle. The black triangles are sometimes blue or green based on different interpretations. | It was first described in the year 1825 and is still present on early 20th century depictions. However, the hydrographic service of the French navy, already in the charter of 1889, doesn't mention it; it is therefore believed that the existence of this flag, if it ever was authentic, does not go beyond 1883.
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| 1868–1945 | Naval Ensign of Cochinchina. | Influences: | It was first described in the year 1825 and is still present on early 20th century depictions. However, the hydrographic service of the French navy, already in the charter of 1889, doesn't mention it; it is therefore believed that the existence of this flag, if it ever was authentic, does not go beyond 1883.
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| Flag | Supposed date | Supposed use | Description | Origin of the misattribution |
| Other variations: | 1802–1885 | Flag of the Nguyễn dynasty, or flag of Vietnam under Nguyễn dynasty, or reportedly the flag of Tonkin. | Said flag can be found in a chart titled Generaale gezicht der Vlaggen welke meeste Natien ter Zee voeren "A general view of the flags which most nations bear at sea" between page viii and page 1 of the book Alegemeene verhandeling van de heerschappy der zee "General Treatise of the Dominion of the Sea" |
Likely based on a flag stated to be flown on ships of the "nation" Tunquin in China. Tonkin was the European exonym during the 17th and 18th centuries for the northern region of modern Vietnam, then nominally reigned by the Revival Lê dynasty yet effectively ruled by the Trịnh lords.
The flag was also used in real life despite its questionable origin. |
| 1821–1922 | Alleged standard of emperor Minh Mạng. | Yellow field with gold border. |
Several plain yellow flags can be seen displayed along with the tricolour flags of France and a partially seen yellow flag containing red-coloured 大南, as depicted in the 1903 oil painting Les mandarins et les autorités françaises attendant l’arrivée de l’Empereur Thanh Thai "The mandarins and the French authorities awaiting the arrival of Emperor Thành Thái" by Trần D. Trọng |
| 1885–1890 | Alleged flag of emperor Đồng Khánh. | Found in Nguyễn Đình Sài's article Quốc Kỳ Việt Nam: Nguồn Gốc và Lẽ Chính Thống "The National Flag of Viet Nam: Its Origin and Legitimacy". A visually similar is found on the webpage Vietnam from website Worldstatemen by UConn-affiliated researcher Ben Cahoon. | An incorrect reading of the Chinese characters 大南 by foreigners with no experience with the script. The correct flag: |
| 1890–1920 | National flag of Đại Nam | Đại Nam Quốc Kỳ, claimed to have been originally issued by Emperor Thành Thái Alleged influences: A description was given that claimed that the flag had a number of symbolic meanings. Yellow, beyond the meaning of a royal symbol, is the traditional colour of Vietnamese nation and the colour of Vietnamese skin, red is the colour of Vietnamese blood together is the "red blood, yellow skin" of the Vietnamese. three red stripes symbolised the united Vietnam under three regions Northern Vietnam, Central Vietnam and Southern Vietnam | The story behind this flag was fabricated by Nguyễn Đình Sài, a former member of the anti-Communist organization Việt Tân, who wrote the article "Quốc Kỳ Việt Nam: Nguồn Gốc và Lẽ Chính Thống” in September 2004. To back up his claim, Nguyền Đình Sài cited a webpage from Worldstatesmen website by Ben Cahoon, an American researcher affiliated with University of Connecticut. However, Nguyễn Đình Sài admitted Cahoon "did not name any specific documents" for Cahoon's claim that the yellow flag with three red stripes was used between 1890 and 1920. Nguyễn Đình Sài fabricated this story so he could give the South Vietnamese flag more historical legitimacy by connecting it with anti-French resistance and national pride decades before it actually existed. |
| 1945 | Flag of the Empire of Vietnam. | Inaccurate depiction of the Empire of Vietnam's national flag, Cờ Quẻ Ly "Li Trigram Flag", which is authentic. This inaccurate depiction has been present on the World Statesmen website since at least 2005, and was on Wikimedia Commons from 2006 to August 2021. | The correct design: |