The settlement formed part of the
Székely Land region of the historical
Transylvania province. Until 1918, the village belonged to the
Háromszék County of the
Kingdom of Hungary. In the immediate aftermath of
World War I, following the declaration of the
Union of Transylvania with Romania, the area passed under Romanian administration during the
Hungarian–Romanian War of 1918–1919. By the terms of the
Treaty of Trianon of 1920, it became part of the
Kingdom of Romania. In 1925, the commune fell within
Plasa Ozun of
Trei Scaune County. In August 1940, under the auspices of
Nazi Germany, which imposed the
Second Vienna Award,
Hungary retook the territory of
Northern Transylvania (which included Ozun) from Romania. Towards the end of
World War II, however, the commune was taken back from Hungarian and
German troops by Romanian and
Soviet forces in September 1944. In 1950, after
Communist Romania was established, Ozun became part of the
Sfântu Gheorghe Raion of
Stalin Region. From 1952 and 1960, it was part of the
Magyar Autonomous Region, and between 1960 and 1968 it reverted to
Brașov Region. In 1968, when Romania was reorganized based on counties rather than regions, the commune became part of Covasna County. ==References==