John O'Hagan is an award-winning commercial and film director.

He was born in Dublin, Ireland; Attended Brown University, where he received a Bachelor of Arts in Modern Culture & Media; New York University Tisch School of the Arts, where he received a Master of Fine Arts in Film; Studied and worked under Todd Haynes, Spike Lee, David Byrne.

O'Hagan began making short films at the age of 20. His short film, Five Spot Jewel, won Best Short at several film festivals. His feature documentary, Wonderland, premiered at the Sundance Film Festival, received five Best Documentary film festival awards, a Cable Ace award for Best Documentary, nominations for Directors Guild of America Best Documentary and the Gotham Open Palm award, and was purchased by HBO.

O'Hagan began directing television commercials with Hungry Man Productions in New York. His commercial work has been distinguished for its wide range, strong visual storytelling, and humor. His first spot, Dial-A-Mattress "Squirrel", won Gold at the Cannes Lions festival. He has since won numerous industry awards including more Gold Lions, Gold CLIOs, a Grand CLIO, D&AD Pencils, One Show Pencils, and has directed international campaigns for Adidas, Coca-Cola, Pepsi, Mercedes, Land Rover, VW, Volvo, Toyota, Microsoft, IBM, Budweiser, Miller, Heineken, Smirnoff, McDonald's, Visa, Samsung. He is probably best known for his direction of the Emmy-nominated campaign and his Cannes Grand Prix-nominated EDS "Cat Herders" commercial, consistently listed as one of the Top 10 Super Bowl commercials ever made. 

O'Hagan is currently directing commercials internationally and in post-production on the feature documentary, Waveland.