While trying to prevent a carjacking, Oliver was shot in the upper chest by a thug. He used the healing drug RL65 to heal himself. Lex Luthor shot Oliver with a gun, but Oliver used RL65 again to cure himself.
While on a desert island, he pricked his hand on a toxic flower. Tess Mercer saved him by using leeches to suck the poison out of his body. Later, he was poisoned again by the same toxin in Metropolis and saved by Clark and Chloe with a LuthorCorp antidote.
When Oliver followed Jimmy into the Talon and discovered that Davis Bloome was still alive, he was held captive in the basement. After convincing Davis to not kill Jimmy, Davis attacked Oliver and nearly killed him before Clark supersped in and took Davis to the Fortress of Solitude.
Winslow Schott trapped Oliver on a pressure plate that he claimed would trigger a bomb if he moved. Oliver attempted to kill himself by stepping off the plate, but in actuality, the pressure plate was a ruse and unbeknownst to Oliver, Clark had disabled the true trigger.
When Chloe tried to disconnect Oliver from a virtual world, she almost killed him but stopped in time. After hacking the virtual world, she rescued Oliver but warned him that if he did not entirely trust her he could die when they jumped from the Daily Planet to the exit.
Oliver's life was saved by Clark after he was possessed and corrupted entirely by Darkseid.
While partying with friends on a private yacht, Oliver's yacht was boarded by thugs and Oliver was almost killed. He escaped by activating an life raft. (Oliver Queen Chronicles)
While adrift at sea in a life raft, Oliver was almost killed by sharks. He stabbed one with an arrow, and it swam away. (Oliver Queen Chronicles)
Oliver was almost killed by a tribe of natives on the island, but a woman spared his life. (Oliver Queen Chronicles)
Oliver stubbed his foot on a rock, but the island natives treated his foot. This prevented him from getting gangrene, a potentially fatal condition given the conditions on the island. (Oliver Queen Chronicles)
Oliver has healed himself at least twice with RL65.
Oliver's life has been at risk 26 times since his introduction in Season Six.
Season Ten is the only season that Oliver has the most near-death experiences with a total of 10.