Click here to read how they escaped.
Richard Matt, 49, was shot dead in woodlands near the town of Malone, about 30 miles (50 km) from the prison.
David Sweat, another convicted murderer, remains at large as police continue to search the area.
The pair escaped through the prison sewer system after using power tools to break out of their cell on 6 June.
The escape from the Clinton Correctional Facility in Dannemora, New York, set off a massive manhunt.
On Friday police were called to an area south of Malone where a camper van had been attacked. They found evidence left behind by the pair in a nearby hunting cabin.
Matt was later found in woodland armed with a shotgun, police say. When he refused to surrender officers shot him dead, they add.
A search for Sweat is continuing in the area. Police say he is dangerous and warned the public not to approach him.
-Culled from BBC World News