Kien Svay (Khmer: ស្រុកកៀនស្វាយ) 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).

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 and Svay Rieng Province.