Carl Friedrich Schmidt (Russian: Фёдор Богданович Шмидт, Fyodor Bogdanovich Schmidt; also known as Friedrich Schmidt; 27 January [O.S. 15 January] 1832 in Kaisma, Livonia – 21 November [O.S. 8 November] 1908 in Saint Petersburg) was Baltic German geologist and botanist in Russian Empire. He is acknowledged as the founder of Estonian geology.
Main papers of Friedrich Schmidt research the stratigraphy and fauna of Lower Palaeozoic rocks in Estonia and the neighboring areas. In 1885 he became academician of St. Petersburg Academy of Sciences. He won the Wollaston Medal, awarded by the Geological Society of London, in 1902.