The poll, conducted by Latino Decisions for the Center for American Progress Action Fund and America's Voice, found Obama's support among Latino registered voters hitting 70 percent for the first time in 20 months.
It was conducted after Obama and Vice President Joe Biden conducted extensive outreach to Latinos, Latino Decisions said.
Obama leads Romney among foreign-born, naturalized citizens by 72 percent to 19 percent, and leads among U.S.-born Latinos 69 percent to 25 percent.
Among so-called Spanish-dominant Latinos, Obama leads 76 percent to 15 percent, while the president leads 66 percent to 28 percent among English-dominant Latinos.
The poll found 13 percent of those surveyed who identified as Republicans, and 60 percent of independents, said they would vote for Obama, while 2 percent of registered Latino Democrats said they would vote for Romney.
Latino Decisions said there is little doubt Obama will win the Latino vote in November, but he could fare poorly overall in battleground states if the Latino voter turnout is low.
The poll was based on interviews with 504 Latino registered voters across all 50 states, using live telephone callers July 7-16. It has an overall margin of error of 4.4 percentage points.