Oliver Jonas Queen, also known by his alter-ego the Green Arrow, is a character in The CW's Arrowverse franchise, first introduced in the 2012 pilot episode of the television series Arrow. The character is based on the DC Comics character of the same name, created by Mort Weisinger and George Papp, and was adapted for television in 2012 by Greg Berlanti, Marc Guggenheim, and Andrew Kreisberg. Stephen Amell portrays Oliver Queen, with Jacob Hoppenbrouwer portraying a young Oliver.

In the series, Oliver, a billionaire playboy, who claimed to have spent five years shipwrecked on Lian Yu, a mysterious island in the North China Sea, returns home to Starling City (later renamed "Star City") to fight crime and corruption as a secret vigilante whose weapon of choice is a bow and arrow. During the first season, Oliver focuses on a list of targets, written by his father, that are taking advantage of the city's citizens. Subsequent seasons have him venturing into all criminal activity, and he shifts from being willing to kill to having a rule against all killing as a means of stopping assailants. In Arrow, Oliver is known during the first season as "The Hood or The Vigilante", but drops those personas once he vows to stop killing and starts using a new name: "The Arrow". He does not take up the "Green Arrow" mantle until season four, after Roy Harper publicly confesses to being "The Arrow" to protect Oliver. He is a friend and frequent ally of the Central City-based superhero The Flash, White Canary, who leads the superhero team the Legends, and the Kryptonian superheroine Supergirl.

Amell appears as Oliver Queen and his vigilante persona in crossovers on the television series The Flash, Legends of Tomorrow, Supergirl, Batwoman, and the animated web series Vixen, all of which are set in the Arrowverse. The character has also appeared in several tie-in comics and novels, as well as appearing in three video games. Amell received praise from critics for his portrayal, for which he has been nominated for various accolades, including a People's Choice and Leo Award.

Oliver Queen first appears in the pilot episode of Arrow. He is discovered on the deserted island of Lian Yu by fishermen, having been shipwrecked there five years earlier following the destruction of his family yacht the Queen's Gambit, which he was on with his father Robert Queen (Jamey Sheridan) and Sara Lance (Jacqueline MacInnes Wood), who did not survive. Oliver returns to Starling City and is greeted by his mother Moira (Susanna Thompson), his sister Thea (Willa Holland), his best friend Tommy Merlyn (Colin Donnell), and ex-girlfriend Laurel Lance (Katie Cassidy). Unknown to his friends and family, Oliver has returned to Starling City to carry out a plan of redemption for his father, who Oliver believes failed to do everything he could to help the citizens of Starling City. Season one focuses on Oliver readjusting to life during the day and spending his nights dressed as a hooded vigilante. As his vigilante persona, Oliver carries a bow and various types of specialty arrows, and acts as judge, jury, and if necessary executioner to the wealthy that have used their money and power to take advantage and hurt the citizens of Starling City, and in the process embroiled into conflicts with some of the city's criminals including the Triad leader China White (Kelly Hu) and drug lord The Count (Seth Gabel).

In the episodes "Lone Gunmen" and "The Odyssey", Oliver is forced to reveal his identity to his bodyguard John Diggle (David Ramsey) and Queen Consolidated IT specialist Felicity Smoak (Emily Bett Rickards). Afterward, each joins Oliver in his quest to save Starling City from a mysterious group who is determined to destroy the Glades, an area of Starling City filled with crime and the underprivileged. Ultimately, Oliver discovers that the group's leader is Tommy's father Malcolm Merlyn (John Barrowman), who is also responsible for Oliver's family's yacht's sabotage and thus his own father's death, which leads Oliver and the elder Merlyn to become enemies. Season one also features flashbacks to Oliver's time on Lian Yu and the inhabitants that he encounters while there. In season one, Oliver meets Yao Fei (Byron Mann) and Slade Wilson (Manu Bennett), who teach Oliver how to survive on the island, training him to fight and use a bow, while plotting to stop Edward Fyers (Sebastian Dunn) from taking out a Chinese commercial airliner.

In season two, Oliver is initially found back on the island, having returned as penance for what he views a personal responsibility for the successful destruction of the Glades and the loss of his best friend. He eventually returns to save his family's company, and decides that he needs to honor his friend by stopping crime in the city without killing. Oliver spends season two being harassed by Slade Wilson, who survived Lian Yu and arrives in Starling City determined to make Oliver suffer the way he did on the island. By the end of the season, Oliver has lost his company to Slade, and must contend with an army of soldiers with superhuman strength that are determined to destroy Starling City on Slade's orders. Oliver and his friends—which now includes trained assassin Sara Lance (Caity Lotz), an aspiring vigilante named Roy Harper (Colton Haynes), and members of the League of Assassins—are able to stop the army and Slade. Season two flashbacks focused on the deteriorating relationship between Oliver and Slade, the discovery of a formula that can create super strength and near invulnerability called the Mirakuru, and a group of prisoners being experimented upon just off the coast of the island.

In season three, Oliver is brought into a confrontation with Ra's al Ghul (Matt Nable) after Sara's death. To protect his sister, who had been drugged and coerced into killing Sara by Malcolm, Oliver claims responsibility for the murder and engages Ra's in a trial by combat. After surviving the sword of Ra's al Ghul, he is pursued by Ra's to become the new leader of the League. After Ra's mortally wounds Thea, Oliver accepts his offer so that he can use the Lazarus Pit to save Thea. In "Al Sah-him", Oliver appears in Starling City to kill Nyssa al Ghul (Katrina Law), who also claims the title of "Heir to the Demon", where it is revealed that he has been brainwashed by Ra's into renouncing all things "Oliver Queen". In "This Is Your Sword", it is shown that Oliver is actually lying to Ra's, and planning to destroy the League from the inside. The season three finale features Oliver killing Ra's, and subsequently giving up being a hero for Starling City and leaving to have a new life with Felicity. Over the course of the season, Laurel and Thea take over Sara and Roy's roles on the team. Season three flashbacks focused on Oliver living in Hong Kong and training under Amanda Waller (Cynthia Addai-Robinson) and her subordinates.

In season four, after retiring from vigilantism, Oliver has live a happy life with Felicity Smoak at Ivy Town, until Thea and Laurel approach him, telling that they need him back at the newly rechristened Star City, which has been taken over by "Ghosts". He eventually discovers that the mastermind is H.I.V.E.'s leader Damien Darhk (Neal McDonough), and become enemies with Darhk as both himself and his vigilante alter-ego. As the "Arrow" persona has been tarnished, Oliver now goes by the code name "The Green Arrow" as he becomes a vigilante once again, but as a symbol of hope for the city, gradually regaining Diggle's trust. Oliver also decides to run for mayor of Star City. During this time, Oliver discovers that he is the biological father to a nine-year child named William (Jack Moore), with Samantha Clayton (Anna Hopkins), a college classmate whom Oliver had a one-night stand during his relationship with Laurel. This discovery complicates his relationship with Felicity and his duty as Green Arrow, as well as threatens to jeopardize his mayoral campaign. After subsequent attacks from Darhk leaving Felicity permanently paraplegic, his son being kidnapped and Laurel is killed, leading Oliver to take his opportunity to kill Darhk when it arises, while his team helps avert Darhk's plans for a nuclear holocaust. Season four flashbacks focus on Oliver returning to Lian Yu on Amanda Waller's orders to infiltrate the mysterious Shadowspire organization.