| Flag | Date | Description |
|---|
 | 1911–1919 | Following the 1911Mongolian declaration of independence duringthe fall of the ChineseQing dynasty, theBogd Khanate of Mongolia adopted a national flag as symbol of this independence.[6][7] The decision to adopt a national flag was also made to follow the international standard at the time in order to promote the image of a modern independent state.[8] A decree established the colours and dimensions of the flag; a yellow oblong rectangle with religious prayer text, in the middle of which was aSoyombo, lotus flower, and the letters "E" and "Bam". From this rectangle flowed red silk tails containing the letters "Om", "Ah", and "Hum".[6][8] Larger flags were intended for government use while smaller versions were intended for ordinary people.[9] Surviving flags can be seen with minor individual differences of the complex design.[8][10][11][12][13] |
 | 1920–1921 | In late 1919 Chinese troopsbegan occupying Mongolia. On 1 January 1920 a ceremony was held which revoked Mongolian autonomy and reincorporated it into China, raising thefive-striped flag of theRepublic of China.[14][15] |
| 1921–1924 | Following the communistRevolution of 1921 Mongolian independence was restored. The country was formally still a monarchy and its flag remained, which had been carried by many of the revolutionary soldiers.[6] |
 | 1924–1940 | Following the death of theBogd Khan in 1924, theMongolian People's Republic was proclaimed. The new republic's first constitution was adopted on 26 November 1924 and described its new flag.[16][17][18] The flag's exact shape and design was not completely standardised and only defined as "the flag is red with the state emblem at the center."[17] It can therefore be seen with some variations, such as without any text or using a rectangular shape without the three tails.[19][20][21][22][23][24][25] |
 | 1940–1945 | In November 1939 Mongolian leaderKhorloogiin Choibalsan discussed the adoption of a new constitution with the leadership of theSoviet Union while visiting there. On 30 July 1940 the second constitution of the Mongol People's Republic was adopted, and with it, the second flag.[16] After having reviewed a draft of the new state emblem,Joseph Stalin advised that "in order to show that there are many animals, the coat of arms should have a man with a horse in the middle and various animal figures around him".[6] This new emblem, stripped of any remaining religious symbolism, was present on the new flag which was described as "consisting of 1:2 sized red cloth with the state emblem in the center and "Mongol People's Republic" written on either side".[26][17][27] |
 | 1945–1992 | At theYalta Conference, towards the end ofWorld War II, it was agreed to preserve the status quo of Mongolia's existence. A new flag with national symbolism was considered necessary for the success of Soviet and Mongolian attempts to convince theChinese to recognize Mongolian independence.Choibalsan brought up the issue of adopting a new flag at the 43rd meeting of the Presidium of the State Conference on 10 July 1945, where the new flag's design was approved.[6][9] Choibalsan chose to restore the Soyombo as a national symbol on the flag and described its adoption as a high celebration of Mongolia's independence.[6][9] The new flag was amended into the constitution in 1949 and was included from the beginning in the constitution adopted in 1960.[18][6][9] The flag was used until the adoption of the democratic constitution and a new flag in 1992. |
 | 1992–2011 | Earlier version of Mongolia's current flag, the star had been removed. |
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