The Reichsmark (sign: ℛℳ) was the currency in Germany from 1924 until 20 June 1948 in West Germany, where it was replaced with the Deutsche Mark, and until the 23 June in East Germany when it was replaced by the East German mark. The Reichsmark was subdivided into 100 Reichspfennig. The Mark is an ancient Germanic weight measure, traditionally a half pound, later used for several coins. From 1871 to 1918 Germany was called the Kaiserreich, or the Deutsches Reich. Although Germany became a republic in 1919, the term "Reich" remained part of the country's official name.

The Reichsmark was introduced in 1924 as a permanent replacement for the Papiermark. This was necessary due to the 1920s German inflation which had reached its peak in 1923. The exchange rate between the old Papiermark and the Reichsmark was 1 ℛℳ = 1012 Papiermark (one trillion in US English and French, one billion in German and other European languages and UK English of the time, see long and short scales). To stabilize the economy and to smooth the transition, the Papiermark was not directly replaced by the Reichsmark, but by the Rentenmark, an interim currency backed by the Deutsche Rentenbank, owning industrial and agricultural real estate assets. The Reichsmark was put on the gold standard at the rate previously used by the Goldmark, with the U.S. dollar worth 4.2 ℛℳ.

With the unification of Germany and Austria in 1938, the Reichsmark replaced the Schilling in Austria. During the Second World War, Germany established fixed exchange rates between the Reichsmark and the currencies of the occupied and allied countries, often set so as to give the Germans economic benefits.

The first Reichsmark banknotes were introduced by the Reichsbank and state banks such as those of Bavaria, Saxony and Baden. The first Reichsbank issue of 1924 came in denominations of 10, 20, 50, 100, and 1000 Reichsmark. This was followed by a second issue in the same denominations, dated between 1929 and 1936. A 20 Reichsmark note was introduced in 1939, using a design taken from an unissued Austrian 100 schilling banknote type. Five Reichsmark notes were issued in 1942. Throughout this period, the Rentenbank also issued banknotes denominated in Rentenmark, mostly in low denominations.

In preparation for the occupation of Germany, the United States issued occupation banknotes dated 1944, printed by the Forbes Company of Boston. These were printed in similar colours with different sizes for groups of denominations. Notes were issued for ½, 1, 5, 10, 20, 50, 100, and 1000 Mark (not Reichsmark). The issuer was the Alliierte Militärbehörde ("Allied military authorities") with In Umlauf gesetzt in Deutschland ("in legal circulation in Germany") printed on the obverse.

The Soviet Union demanded copies of the engraving plates, ink, and associated equipment in early 1944, and on 14 April 1944 Henry Morgenthau and Harry Dexter White of the U.S. Treasury Department authorized the immediate air transfer of these to the USSR. Using a printing plant in occupied Leipzig, the Soviet authorities printed large runs of occupation marks. Since these were convertible to U.S. dollars at a rate of 10:1, the exercise financed the Soviet occupation while causing inflation and financial instability. An investigation by the United States Congress (Occupation Currency Transactions Hearings before the Committee on Appropriations, Armed Services and Banking and Currency, U.S. Senate, 1947) found that about $380,000,000 "more currency than there were appropriations for" had been circulated.

The fractional banknotes in denominations of 1, 5, 10 and 50 Reichspfennig were issued in 1942.  Some of these banknotes were also supposedly overstamped with the seal of the Wehrmacht.  However these stamps may be modern day forgeries. The green 10 Reichspfennig banknote has the Wehrmacht Luftwaffe stamp on the reverse. 

The 1944 banknotes replaced the 1942 series. 

The 1, 5, 10 and 50 Reichsmark banknotes for the Wehrmacht were issued in 1944