And 45 per cent expect to buy one in the next two years.
New Q2 data from the Consumer Electronics Association shows 29 per cent of online US consumers now own a tablet, a nine per cent increase on Q1, while global sales for the year are set to hit 68.5m.
Two-thirds plan to buy a tablet in the future, with 45 per cent to purchase one within two years.
Shipment revs are expected to reach $29.1 billion this year, $11bn more than originally thought in January, and the CEA claims this will push the consumer electronics industry revs across $200bn for the first time.
Kevin Tillmann, senior research analyst, CEA, said: "The overall market for tablets continues to grow significantly with household penetration increasing for the foreseeable future.
"Rarely has a new device category been so quickly embraced by consumers, businesses and education."
Viewing films is the most common use for tablet owners, with social networking in second, music in third, and book reading in fourth.