Uzundere is a valley in the Novo-Bayazid uezd of the former Iravan governorate, later in the former Chambarak (Krasnoselsk) district, and currently in the Gegharkunik province. It is located to the east of Tokhluja (Drakhtik) village.

The toponym was coined by combining the word “uzun” used in the sense of “wide” in Azerbaijani and the word “dere” used in the sense of “a valley, a deep hollow in the plain between two mountains or hills”.