Oh Man or O Man may refer to:

• A phrase used to express disappointment or annoyance

• "Oh Man", a 1987 Harry Chapin song from the album Remember When the Music
• "Oh Man", a 2009 Grandmaster Flash song from the album The Bridge (Concept of a Culture)
• "Oh Man", a 2010 Born Ruffians song from the album Say It
• "Oh Man", a 2010 Dr. Dog song from the album Shame, Shame
• "Oh Man", a 2018 Jain song from the album Souldier
• "Oh Man", a 2020 single by Amanda Blank
• "Oh Man", a 2025 Justin Bieber song from the album Swag II

• Oh Man, a trail at Bishop Peak in California
• Oh Man!, a 2001 film by Gauri Shinde
• Oh Man, a 2018 art project by Hetain Patel
• Ô Man, another name for the Mantsi language
• O'Man, the third golf hole at Whistling Straits in Wisconsin

• All pages with titles containing O Man
• Oman, a country on the Arabian peninsula
• Ohman, a surname