The animal that produces the majority of the world’s milk is the cow. Dairy cattle are responsible for most global milk production, far exceeding the contributions of sheep, goats, and water buffalo when milk from all species is counted worldwide.
The Food and Agriculture Organization estimated that cow milk accounted for about 85% of global milk production in 2011. Cows are especially productive because humans have selectively bred dairy cattle for centuries, while modern farms use specialized nutrition, health care, breeding programs, and milking systems to increase yields.
Holstein-Friesian cattle are among the best-known dairy breeds and are widely used in Europe, North America, and elsewhere. A dairy cow generally begins lactating after giving birth, and commercial farms manage breeding and milking cycles to maintain production.
One common source of confusion is India’s position as the world’s largest overall milk-producing country. India produces enormous quantities of both cow milk and buffalo milk, so country rankings do not change the answer to this question. “Buffalo” is a major milk source, particularly in South Asia, but cows remain the leading milk-producing animal globally.