The Asian Century is the projected 21st-century dominance of Asian politics and culture, assuming certain demographic and economic trends persist. The concept of Asian Century parallels the characterisation of the 19th century as Britain's Imperial Century, and the 20th century as the American Century.

A 2011 study by the Asian Development Bank found that 3 billion Asians (so 56.6% of the estimated 5.3 billion total inhabitants of Asia by 2050) could enjoy living standards similar to those in Europe today, and the region could account for over half of global output by the middle of this century.

Some argue that Asia's growing emphasis on solidarity, as well as maturing and progressive relationships among countries in the region, will further underpin the creation of the 21st Asian Century. However, the worsening relations between China and India make hopes for a peaceful and cooperative Asian world order seem unlikely.

In 1924, Karl Haushofer used the term "Pacific age," envisaging the growth of Japan, China and India: "A giant space is expanding before our eyes with forces pouring into it which ... await the dawn of the Pacific age, the successor of the Atlantic age, the over-age Mediterranean and European era." The phrase Asian Century arose in the mid to late 1980s, and is attributed to a 1988 meeting with Paramount leader Deng Xiaoping of China and Prime minister Rajiv Gandhi of India in which Deng said that '[i]n recent years people have been saying that the next century will be the century of Asia and the Pacific, as if that were sure to be the case. I disagree with this view.' Prior to this, it made an appearance in a 1985 US Senate Committee on Foreign Relations hearing. It has been subsequently reaffirmed by Asian political leaders, and is now a popularly used term in the media.

Asia's robust economic performance over the three decades preceding 2010, compared to that in the rest of the world, made perhaps the strongest case yet for the possibility of an Asian Century. Although this difference in economic performance had been recognised for some time, specific individual setbacks (e.g., the 1997 Asian financial crisis) tended to hide the broad sweep and general tendency. By the early 21st century, however, a strong case could be made that this stronger Asian performance was not just sustainable but held a force and magnitude that could significantly alter the distribution of power on the planet. Coming in its wake, global leadership in a range of significant areas—international diplomacy, military strength, technology, and soft power—might also, as a consequence, be assumed by one or more of Asia's nation states.

Among many scholars have provided factors that have contributed to the significant Asian development, Kishore Mahbubani provides seven pillars that rendered the Asian countries to excel and provided themselves with the possibility to become compatible with the Western counterparts. The seven pillars include: free-market economics, science and technology, meritocracy, pragmatism, culture of peace, rule of law and education.

Professor John West in his book 'Asian Century … on a Knife-edge' argues:

"Over the course of the twenty-first century, India could well emerge as Asia’s leading power. Already, India’s economy is growing faster than China’s, a trend which could continue, unless China gets serious about economic reform. Further, India’s population will overtake China’s in 2022 and could be some 50% higher by 2100, according to the UN".