| Pyotr Karlovich Uslar | |||||
| Native Name: | Пётр Карлович Услар | ||||
| Native Name Lang: | ru | ||||
| Birth Place: | , Vyshnevolotsky Uyezd, Tver Governorate, Russian Empire | ||||
| Death Place: | Kurovo, Vyshnevolotsky Uyezd, Tver Governorate, Russian Empire | ||||
| Nationality: | Russian | ||||
| Occupation: | linguist, ethnographer, caucasologist | ||||
| Known For: | Works on Caucasian languages, as well as creation of first alphabets for them | ||||
| Spouse: | Sofiya Krabbe (died in 1843) | ||||
| Mother: | Vera Chikhachëva | ||||
| Father: | Karl Uslar | ||||
| Relatives: | Karl Uslar (grandfather) | ||||
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| Signature: | Uslar-signature.JPG | ||||
Baron Pyotr Karlovich Uslar (Russian: Пётр Карлович Услар|p=ˈpʲɵtr kərɫəvʲɪt͡ɕ ʊsɫər), known by his German name Peter von Uslar (–), was a Russian general, engineer and linguist of German descent, known for his research of languages and ethnography of peoples of Caucasus.
Peter von Uslar was born in in Kurovo manor in Vyshnevolotsky District, Tver Governorate, Russian Empire. His grandfather was a native of Hanover who in 1765 moved to Russia and subsequently joined the ranks of Imperial Russian Army.
After graduating from the Chief Engineering School, he graduated from the General Staff Academy and did not have formal education in linguistics.
In 1850 he was appointed member of the Caucasus Department of the Russian Geographical Society and ordered to compile the history of the Caucasus region. This appointment had eventually led to his interest in researching of Caucasian languages and to his tremendous contribution into the recording of numerous Caucasian languages from various linguistic groups, such as Abkhaz, Ubykh, Svan, Chechen, Avar, Lak, Tabasaran, Lezgian, Dargin, etc.