A BBC News poll that surveyed close to 22,000 people in 21 countries found most would re-elect President Obama.
An average of 50% favored Obama, with 9% for Mr Romney.
Only Pakistan's respondents said they would prefer to see Romney win today's election.
France was the most strongly pro-Obama (72%).
The survey was conducted by GlobeScan/PIPA between 3 July and 3 September.