Milo is a chocolate-flavoured malted powder product produced by Nestlé, typically mixed with milk, hot water, or both, to produce a beverage. It was originally developed in Australia by Thomas Mayne in 1934.

Most commonly sold as a powder in a green can, often depicting various sporting activities, Milo is available as a premixed beverage in some countries and has been subsequently developed into a snack bar, breakfast cereal and protein granola. Its composition and taste differ from country to country.

Milo maintains significant popularity in a diverse range of countries throughout the world, particularly in Australasia, Asia, and Africa.

In 1934, Australian industrial chemist and inventor Thomas Mayne, who was working at Nestlé, developed "Milo" and launched it at the Sydney Royal Easter Show. Mayne came up with his formula for Milo combining malt extract (made from malted barley), full cream milk powder, cocoa, sugar, mineral salts, iron and vitamins A, D and B1, in an attempt "to develop a completely balanced food drink which contained all the necessary proteins and minerals".It was intended to help children to obtain enough nutrients in their diet.

Nestlé, which had taken ownership of a milk-processing plant in Smithtown, New South Wales, in 1921, started producing the product not long after the show. The name was derived from the famous ancient athlete Milo of Croton, after his legendary strength. The product was even noted as "tonic food".