Family name O'Hair (O'Hair 
) , all around the world, is a rare last name. The family name O'Hair is habitual in the United States, where it is a very rare surname, Australia, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Australia, and the United Kingdom.
| VARIANT | COUNTRY |
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| O'Hair | United States, New Zealand, United Kingdom, Australia |
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madalyn murray o'hair American atheist activist (1919-1995), US (b. 1919) |
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sean o'hair professional golfer, US (b. 1982) |
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| dan o'hair (b. 1953) |
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| richard a. o'hair researcher |
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| daniel o'hair researcher |
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| allison o'hair Ph.D. Massachusetts Institute of Technology 2013 |
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| john r. o'hair Ph.D. Air Force Institute of Technology 1994 |
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| alyssa k. o'hair researcher |
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| tim o'hair |
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Meg, Kyle, Paul, Pegi, Reed, Ryan, Dean, Dede, Dana, Dave, Dale, Dody, Gary, Greg, Gina, Lana, Lisa, Jake, Josh, John, Joan, Joel, Kirk, Jodi, Kate, Bill, Sam, Amy, Kim, Dan, Don, Jan, Joy, Jen, Jim, Tom, Tim, Marc, Mary, Mark, Mike, Sara, Sean, Andy, Chad, Carl, Cale, Kary, and Jess