Retired Lt. Bill Kelly of East Rockaway, who was among those who responded to the World Trade Center after the 2001 terror attacks, died Saturday of a 9/11-related illness, according to the FDNY.

Kelly, 64, had most recently served with Ladder 116 in Queens, according to the Uniformed Fire Officers Association.

He was appointed to the fire department on April 15, 1989, and retired on Aug. 1, 2012, the FDNY said in a statement.

“The toll continues to mount for those who responded to the attacks on 9/11 and for those who subsequently worked at the site for the months to follow,” Uniformed Fire Officers Association president Jake Lemonda said in a statement. “Lt. Bill Kelly succumbed to his illnesses sustained from his work at the World Trade Center site. Our prayers and thoughts are with the Kelly family at this time.”

Uniformed Firefighters Association president Gerard Fitzgerald said in a statement: “Lt. Kelly was a true leader and embodied everything that makes the FDNY truly, ‘The Bravest.’ His passing is yet another tragic reminder that nearly 16 years after the 9/11 attacks first responders continue to suffer from illness and cancer as a result of their selflessness during the immediate rescue and recovery efforts.”

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Survivors include his wife, Maureen, and children, William, Bridget and Colin, according to a death notice published in Newsday on Monday.

Visiting hours are from 2 to 4 p.m. and 7 to 9 p.m. Tuesday at Donza Funeral Home in East Rockaway. The funeral is Wednesday at St. Raymond of Penyafort Roman Catholic Church in East Rockaway at 10:45 a.m.