IDC said PC shipments for the second quarter of 2002 reached 5.8 million, 5.4% higher than last year's figure of 5.5 million.
China, the region's largest PC market, grew by 6.6% to total 2.5 million units, or a 43% share of the overall market.
Korea is the second-largest market in the region, with sales up 7.8% from last year at 874,000.
India has overtaken Australia as the region's third biggest PC market, with second-quarter sales of 537,000 compared with Australia's 525,000.
PC sales in Australia have not grown in the past year, while India chalked up 5.8% growth, IDC said.
Most of the countries in the region have seen growing PC sales except for Hong Kong, where a large one-off government purchase last year led to this year's sales showing a 23.9% fall. Mature markets such as Singapore, Taiwan and New Zealand have grown more slowly than developing markets such as Thailand and Indonesia, IDC said.
Asia's year-on-year growth figure of 5% compares with sales falls in Japan (12%), the US (0.8%), Europe Middle East and Africa (0.3%), and modest growth in Latin America (4.3%) and Canada (1.4%), according to Gartner.
Asia now accounts for 17% of worldwide PC sales, up from 16.1% a year ago, Gartner said.
The vendor picture has changed, with the combined Hewlett-Packard (HP) and Compaq brands seeing shipments fall by 16.1% over the past year to 4.63 million, while nearest rival Dell Computer saw shipments rise by 13.1% to 4.46 million.
In Asia-Pacific, Chinese manufacturer Legend Group is the market leader, posting 12.9% growth to reach sales of 711,000 units for the second quarter of 2002.
HP, IBM and Dell are the next-largest vendors, with Dell strengthening its position with year-on-year sales growth of 16.6%, Gartner said.