The Tày people speak a language of the Central Tai language group, and live in northern Vietnam.

They are sometimes also called Thô, T'o, Tai Tho, Ngan, Phen, Thu Lao, or Pa Di.

There are about 1.7 million Tày people living in Vietnam (based on the 2009 census and five years of population growth).

This makes them the second largest ethnic group in Vietnam after the majority Viet ethnic group.

Most are in northern Vietnam in particular in the Cao Bằng, Lạng Sơn, Bắc Kạn, Thái Nguyên, and Quảng Ninh Provinces, where they live along the valleys and the lower slopes of the mountains.

They also live in some regions of the Bắc Ninh and Bắc Giang provinces.

They inhabit fertile plains and are generally agriculturalists, mainly cultivating rice.

They also cultivate maize, and sweet potato among other things.

Tày villages are usually based at the feet of mountains and are often named after a mountain, field or river.

Each village has about fifteen to twenty households.

The Tày are closely related to the Nùng and the Zhuang on the Chinese side of the Vietnamese-Chinese border.