The child had waded no more than 1 or 2 feet into the water of the Seven Seas Lagoon around nightfall Tuesday when he was taken from a small beach, authorities said. The Nebraska family of four was on vacation at a Disney World resort.
Demings said there have been no other alligator attacks on the lake.
Some visitors were surprised to learn the reptiles lived on the property.
“My question is why are there alligators in there?” said Michelle Stone, who lives near Detroit and was visiting Disney for 10 days with her two children.
A Disney spokeswoman did not immediately return a message seeking comment. The sheriff said the company has a wildlife management system and has “worked diligently to ensure their guests are not unduly exposed to wildlife here in this area.”
Though Florida has grown to the nation’s third-most populous state, fatal alligator attacks remain rare. Since 1973, 23 people have been killed by wild alligators in Florida, according to data compiled by the Florida Fish and Wildlife Conservation Commission. Those fatalities were among 383 unprovoked bites not caused by someone handling or intentionally harassing an alligator.
The grim news was only the latest for a city buffeted by tragedy in the past few days.
On Sunday, a gunman opened fire at a gay nightclub in Orlando, leaving 49 people dead in the worst mass shooting in modern U.S. history. On Friday night, Christina Grimmie, 22, a contestant on season six of “The Voice,” was fatally shot as she signed autographs after a show in Orlando.
Disney is the parent company of ABC7. WPVI-TV contributed to this report