Socialist heraldry, also called communist heraldry, consists of emblems in a style typically adopted by communist states and filled with communist symbolism. Although commonly called coats of arms, most such devices are not actually coats of arms in the traditional heraldic sense and should therefore, in a strict sense, not be called arms at all. Many communist governments purposely diverged from the traditional forms of European heraldry in order to distance themselves from the monarchies that they usually replaced, with actual coats of arms being seen as symbols of the monarchs.
The Soviet Union was the first state to use socialist heraldry, beginning at its creation in 1922. The style became more widespread after World War II, when many other communist states were established. Even a few non-socialist states have adopted the style, for various reasons—usually because communists had helped them to gain independence—but also when no apparent connection to a Communist nation exists, such as the emblem of Italy. After the fall of the Soviet Union and the other communist states in Eastern Europe in 1989–1991, this style of heraldry was often abandoned for the old heraldic practices, with many (but not all) of the new governments reinstating the traditional heraldry that was previously cast aside.
The Soviet Union, created after the 1917 revolution, required insignia to represent itself in line with other sovereign states, such as emblems, flags and seals, but the Soviet leaders did not wish to continue the old heraldic practices which they saw as associated with the societal system the revolution sought to replace. In response to the needs and wishes, the national emblem adopted would lack the traditional heraldic elements of a shield, helm, crest and mantling, and instead be presented more plainly. This style was followed then by other socialist and communist states, which wished to also focus attention on the nation's workers and diverge from feudalism and all of its associations.
In some communist countries, the socialist heraldry was never adopted fully. The coat of arms of Poland was only changed slightly under the communist era, retaining the traditional heraldic form. In Hungary, the "Rákosi badge", an emblem in the form of socialist heraldry, was adopted following the Second World War, but after the 1956 uprising, a new emblem was created combining communist symbolism with a heraldic shield in the colours of the Hungarian flag. Czechoslovakia became a Communist country in 1948 but retained its original coat of arms until 1961, when they were replaced with a non-traditional shield depicting the heraldic Bohemian lion without a crown and with a red star above head. Some of the states of Yugoslavia also used heraldic shields coupled with socialist imagery in their emblems, as did two republics within the USSR: the Russian Soviet Federative Socialist Republic and the Ukrainian Soviet Socialist Republic.