Heidenreich is a German surname which may be translated as "Land of the Heather," or "Power of the Heathens," or "Realm of the Heathens". Notable people with the surname include:
Heidenreich of Chełmno, first bishop of the Bishopric of Chełmno, 1245–1263
Kaspar Heidenreich (1510–1586), German reformer
Ludwig Heidenreich von Callenberg (died 1637), German officer
David Elias Heidenreich (1638–1688), German writer
Gustav Heidenreich (1819–1855), German painter
Adolf Heidenreich (1897–1958), German politician (SPD)
Fritz Heidenreich (1895–1966), German sculptor
Elke Heidenreich (born 1943), German TV journalist
Gert Heidenreich (born 1944), German writer
Walter Heidenreich (born 1949), German preacher
Herbert Heidenreich (born 1954), German footballer
Hans-Jürgen Heidenreich (born 1967), German footballer
Maximilian Heidenreich (born 1967), German footballer
Jon Heidenreich (born 1972), American professional wrestler