Count Johan Adam Cronstedt (12 November 1749 – 21 February 1836) was a Swedish Lieutenant General and governor of Östergötland County. He joined up aged 14 and participated in the Russo-Swedish War (1788–90), but he is most notable for his part in the 1808-09 Finnish War and his command of the Savo Brigade.

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You can help expand this article with text translated from the corresponding article in Finnish. (December 2010) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Finnish Wikipedia article at [[:fi:Johan Adam Cronstedt]]; see its history for attribution. You should also add the template {{Translated|fi|Johan Adam Cronstedt}} to the talk page. For more guidance, see Wikipedia:Translation.