In Vietnamese, encyclopedia are known as Bách khoa toàn thư, literally meaning "complete book of a hundred subjects".
The first work which was considered as an encyclopedia of Vietnam is an 18th-century book Vân đài loại ngữ by Lê Quý Đôn, a Lê dynasty Confucian scholar.
Following the increasing of Internet usage in Vietnam, many online encyclopedias were published.
The two largest online Vietnamese-language encyclopedias are Từ điển bách khoa toàn thư Việt Nam, a state encyclopedia, and Vietnamese Wikipedia, a project of the Wikimedia Foundation.
Notable encyclopedic works and encyclopedias written in the Vietnamese language or focused on Vietnam-related topics include: Encyclopedic works and encyclopedias focused on Vietnam War-related topics.