Kien Svay () is a district (srok) of Kandal Province, Cambodia. The district is subdivided into 12 communes (khum): Banteay Daek, Chheu Teal, Dei Edth, Kampong Svay, Kbal Kaoh, Kokir, Kokir Thum, Phum Thum, Preaek Aeng, Preaek Thmei, Samraong Thum, Veal Sbov; and 46 villages (phum).
Near the town is a "resort" of small shacks on stilts above a river. This is a popular weekend jaunt for Phnom Penh residents.
Kien Svay District lies on road number 1. It is connected between Phnom Penh Capital to Svay Rieng Province.
Most people here are farmers.