Tim O'Brien may refer to:

• Tim O'Brien (author), American author
• Timothy O'Brien, professor
• Timothy L. O'Brien, American journalist
• Tim O'Brien (musician), American musician
• Sir Tim O'Brien, Irish-born cricketer
• Tim O'Brien (politician), legislator in the Connecticut House of Representatives
• Tim O'Brien (illustrator)

This disambiguation page lists articles associated with the same personal name. If an internal link led you here, you may wish to change the link to point directly to the intended article.