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 a Baltic German geologist and botanist in the Russian Empire. He is acknowledged as the founder of Estonian geology. In the mid-19th century, he researched Estonian oil shale, kukersite, and named it as kuckers. Friedrich Schmidt was the first European to "discover" the Sakhalin Fir on the Russian island of Sakhalin in 1866, but he did not introduce it to Europe.