Overseas markets bring in more advertising revenue than the United States for Facebook, amounting to 51 percent of global ad sales in the first quarter, with growth in Asia the fastest in the world at 57 percent, company executives told Reuters.
While Facebook has reported regional growth in percentage terms, this is the first time it has detailed ad sales outside the United States and Canada as a percent of worldwide sales.
related investing news
Like the advertisers it courts, the world's largest social media platform looks at international markets for growth.
Read MoreCramer: Don't sellFacebook's stock—here's why
"The next 1 billion consumers are going to come from these countries," said Carolyn Everson, vice president, global marketing solutions at Facebook.
Total advertising revenue for the quarter increased 46 percent to $3.3 billion, the vast majority of Facebook's $3.5 billion in quarterly revenue. Fifty-one percent of total ad revenue would be about $1.7 billion for international markets. International advertising revenue rose 36 percent from a year earlier, Facebook said.
While Europe is growing slower than the United States, the Asia Pacific region is ahead and a focus for Facebook.
By comparison, Google said that 57 percent of its revenue was from international markets in the first quarter, although it did not break out ad revenue specifically.
Mobile advertising represents more than 70 percent of Facebook's total ad revenue, and mobile is particularly strong and attractive to advertisers in emerging markets, Everson said.
Read MoreGoogle & Facebook scrap satellite web plans: Report
Facebook is benefiting from exporters in China trying to reach people outside its country and from an influx of venture capital funding into India, giving start-ups funds for advertising.
Chinese businesses are getting more sophisticated about promoting their brands, said Dan Neary, vice president of Facebook's Asia Pacific region. "Increasingly manufactures are becoming savvy marketers in their own right," he said.
While Facebook has offices in Hong Kong, Everson said there is "no news to share" on further expansion in China.
In India, e-commerce startups are exploding and many are using Facebook's advertising platform to reach new consumers, Neary said.
The company has also initiated specific methods tailored to the country including optimizing video and pictures for slower connections in India, where an ad product called "missed call" also helps customers avoid phone call charges.
Read MoreSocial media mistakes that could kill your career
Many people in India dial a friend and hang up to send a signal without incurring charges.
Facebook incorporated this system into its ads. A person can place a "missed call" by clicking on a mobile ad from Facebook and receive a return call with information, for example the score of a cricket game, sponsored by a brand.
Facebook also plans to capitalize on the visual images, specifically photography and videos, that are being embraced by younger audiences across the world. Instagram, the popular photo app, announced on June 2 it is opening up its platform to all types of businesses, not just hand-selected brands and will begin rolling out more specific targeting capability globally this year.