Khoito-Aga is a village in Aginsky District of Zabaykalsky Krai, Russia. It is the administrative center of the rural settlement "Khoito-Aga".
In 1930, on the territory of the Aginsky khoshun of the Aginsky aimag of the Buryat-Mongol ASSR, collective farms named "Lenin" and "Komsomol" were formed from small households; in 1952 they were merged into a single collective farm named "Lenin".
In 1995, the collective farm was renamed as the agricultural cooperative "Khoito-Aga".
The cooperative's functions include the production and sale of agricultural products (meat, milk, wool, grain).