Stamps were produced by hand-stamping on to paper until 1865 when stamps printed in Bucharest were issued.

1871-1914
In 1896 overprinted Romanian stamps in' Turkish currency were issued for the postal service on Romanian ships between Constanta and Constantinople (See Turkish Empire under Asia).

1914-18
During the occupation of Romanian territory Bulgarian troops occupied the Dobruja area and overprinted stamps were issued in 1916. These were for this area only. The rest of occupied Romania, all except Bukovina and north-eastern Moldavia, used overprinted German stamps or those of the Austro-Hungarian military post until November 1918.

1918-39
In 1919 Romania assisted in the occupation of European Turkey and a P0 was established on board ship in Constantinople. This used overprinted Romanian stamps and was only open for a very short time (See also Romanian P0 in the Turkish Empire under Asia).

On 1 December 1918 the union of Transylvania, the eastern portion of Hungary, with Romania was proclaimed, but the final frontiers were not finalized until the Treaty of Trianon in June 1920. Hungarian stamps which were in stock at the POs in this area were overprinted in Romanian currency, were then used throughout Transylvania and were valid for the rest of Romania.

Three other areas had overprinted stamps during the period before the Treaty of Trianon.

Banat Bacska: stamps issued in July 1919 after the withdrawal of Serbian troops. Subsequently divided between Romania and Yugoslavia.
Debrecen : Stamps issued on 20 November 1919; this area was retained by Hungary and Romanian stamps were withdrawn in 1920.
Temesvar : Originally occupied by Serbian troops, who used their own overprinted stamps until August 1919. On 20 August overprinted Romanian stamps were issued until the area was a warded to Romania and renamed Timisoaro.

1939-45
Romania sided with the Axis powers in World War II. In April 1944 Russian troops entered Romania and gradually took over the country. On 23 August a coup d'etat in Bucharest led by King Michael overthrew the pro-German government and the Romanians turned on their former allies. In October Russian dominance over Romania was recognized.

1945 to date
After World War II Transylvania and southern Dobruja were returned to Romania, but Bessarabia remained part of Russia. The country remained a kingdom until 30 December 1947, when it became a People's Republic. A revolution in December 1989 led to the overthrow of Nicholas Ceausescu who had been President since 1967. A provisional Government was formed which abolished the leading role of the Communist Party, promised free elections and changed the Country's name to Romania.