WASHINGTON (Reuters) - Presidential candidate Mitt Romney has widened his lead over rival Newt Gingrich to 11 points in Florida, with just three days remaining before the state's Republican primary, according to Reuters/Ipsos online poll results released on Saturday.

The online poll showed Romney, a former Massachusetts governor and private-equity executive, ahead of Gingrich, a former speaker of the U.S. House of Representatives, by 43 percent to 32 percent among likely voters in Florida's Tuesday primary.

Former Pennsylvania Senator Rick Santorum trailed with 16 percent, although he had gained ground from 13 percent in a similar poll a day earlier. Texas Congressman Ron Paul was at 6 percent.

(Reporting by Patricia Zengerle; Editing by Doina Chiacu)