The report from marketing analyst Outsell forecasts that marketers will spend $119.6bn on digital strategies and $111.5bn on print, including ads in newspapers and magazines and all direct mail.
Overall, US ad spend is expected to return to growth and increase 1.2% to $368bn.
Despite the growth of online, magazine advertising is expected to increase by 1.9% to $9.4bn after falling 26% last year.
Chuck Richard, vice president and lead analyst at Outsell, said: "Advertisers are directing dollars toward the channels which generate the most qualified leads and most effective branding.
"As they emerge from the recession, they need more accountability, and they're spreading their spending over a widening set of options."
The Outsell report surveyed more than 1,000 US marketers online in December.
Last September, a report from the Internet Advertising Bureau (IAB) suggested that online had usurped TV to become the biggest advertising medium in the UK after rising 4.6% in the first half of 2009.
According to the biannual IAB report, internet UK ad spend generated £1.75bn pounds and accounted for 23.5% of all spend. This compared with 18.7% in the first half of 2008. Elsewhere, Television accounted for 21.9%, press display for 18.5% and direct mail for 11.5%.
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