The flag of the Udmurt Autonomous Soviet Socialist Republic was adopted in 1954 by the government of the Udmurt Autonomous Soviet Socialist Republic.

On April 6, 1955, Article 110 of the Constitution of the Udmurt ASSR was amended:[3] The state flag of the Udmurt Autonomous Soviet Socialist Republic is the state flag of the RSFSR, consisting of a red cloth with a light blue stripe at the flagpole, the full width of the flag.

Above them is a red five-pointed star, framed by a gold border, and below the sickle and hammer are placed the golden letters “УАССР”.

The ratio of the flag's width to its length is 1:2.The decree on the state flag of the Udmurt ASSR was approved by the Decree of the Presidium of the Supreme Soviet of the Udmurt ASSR on March 10, 1956.

the hammer and a red five-pointed star above them, framed by a gold border, and under them in gold letters is placed the inscription "Udmurt ASSR" in Russian and Udmurt languages .The ratio of the width of the flag to its length - 1:2