Assistant Chief Dominick Carfi said firefighters arrived shortly after 5 a.m. Monday, responding to a report of a person trapped on the third floor of a three-story house in Bridgeport.
The Connecticut Post reports that firefighters were unable to search the third floor because the fire was too heavy.
They found the child after putting out the fire. He was not immediately identified.
The Hartford Courant reports that the child's mother and grandmother and eight others escaped safely.
It was not immediately known how the fire started.