Heinrich is a male given name or surname of Germanic origin. Equivalents in other languages are Henry (English), Hendrik (Dutch), Hinnerk (Low german), Enrico (Italian), Henri (French), Enrique (Spanish), Enric (Catalan), and Henrique (Portuguese). A pet form of Heinrich is "Heinz". The once-common Americanized nickname "Heinie" is largely obsolete. It survives in the public consciousness as a nickname of several early 20th century German-American baseball players, for example Heinie Zimmerman and Heinie Manush.

People whose given name is or was "Heinrich" may include:

• Heinrich I, first German king
• Heinrich Boere (born 1921), Dutch Nazi collaborator
• Heinrich Hertz, German physicist
• Heinrich Hoffmann, a 19th century German psychiatrist
• Heinrich Himmler, former head of the SS
• Heinrich Heine, German poet
• Heinrich Müller, former head of the Gestapo
• Heinrich Schliemann, the archeologist who discovered Troy
• Heinrich von Vietinghoff, a Generaloberst of Wehrmacht during WWII
• Ferdinand Adolf August Heinrich Graf von Zeppelin, founder of the Zeppelin airship company
• Heinrich Wilhelm Ernst, the famous violin virtuoso considered to be Paganini's successor
• Heinrich, a character in the Conker series

People whose surname is or was "Heinrich" may include:

• Bernd Heinrich, a zoologist at the University of Vermont and an author of a number of books on zoology, ecology, and evolution
• Herbert William Heinrich
• Hartmut Heinrich (see Heinrich event)
• Martin Heinrich, American politician
• Stephanie Heinrich, Playboy model
• Volker Heinrich, German naturalist