Asia is a continent which is part of Eurasia. It is the largest continent in the world by both land area and population and shares the landmass of Afro-Eurasia with Europe and Africa. Asia covers an area of 44,579,000 square kilometres, about …Asia is a continent which is part of Eurasia. It is the largest continent in the world by both land area and population and shares the landmass of Afro-Eurasia with Europe and Africa. Asia covers an area of 44,579,000 square kilometres, about 30% of Earth's total land area and 8.7% of Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Its 4.7 billion people constitute roughly 60% of the world's population, having more people than all other continents combined.