The firm said people had been buying tablets to serve as an affordable means of accessing the Internet for their work, learning and leisure during the COVID-19 outbreak.
It pointed out that spending on other things like dining out, entertainment and travel had fallen during the pandemic.
Apple was the top vendor again, shipping 13.9 million units and recording year-on-year growth of 17.4%, with its best showing in the education sector.
Amazon fell one rank, to third, with 5.4 million units shipped. In the third quarter of 2019, the company had taken the second position after Apple.