| Friedrich von Berchtold | |
| Birth Date: | 1781 10, df=yes |
| Birth Place: | Stráž nad Nežárkou |
| Death Place: | Buchlovice |
| Fields: | Botany, Medicine |
| Author Abbrev Bot: | Bercht. |
Count Friedrich Carl Eugen Vsemir von Berchtold, baron von Ungarschitz (Bedřich Karel Eugen Všemír Berchtold hrabě z Uherčic; 25 October 1781 – 3 April 1876), was a German-speaking Bohemian physician and botanist of Austrian descent.
Berchtold was born in Stráž nad Nežárkou (German: Platz an der Naser) (now Jindřichův Hradec District), in the Austrian Empire.He graduated from medical school in 1804, after which he practiced medicine and devoted much of his time to botany and natural history. He eventually abandoned regular medical practice and travelled throughout Europe, the Middle East and Brazil. He co-authored several research papers with brother botanists Carl Borivoj Presl and Jan Svatopluk Presl, including an important taxonomic work, O Přirozenosti Rostlin.
An avid worker for Czech national revival, Berchtold was involved in the establishment of the Prague National Museum. He died in 1876 in Buchlau (now Buchlovice), Moravia (now part of the Czech Republic).
The genus Berchtoldia C.Presl (syn. Chaetium Nees) was named in his honor.
Hrabě is the Czech equivalent, the female form is hraběnka.