He took off his police gear and broke a path through the ice using his hands to reach the boy.
He was able to dive in and grab the boy about 25 feet from the shoreline.
"He and another citizen were actually able to break through the ice, go into the water, and retrieve the boy out of the pond," Lt. Crouse told Fox News. "He was taken to a nearby ambulance."
The boy was airlifted to a hospital in nearby St George to undergo treatment.
His current condition is not yet known.
The deputy was also hospitalized with cuts and bruises and symptoms of hypothermia.
The extent of his injuries wasn't immediately known either.