Cognomen Blackmar (Blackmar 
) , worldwide, is a rare family name. The family name Blackmar is habitual in the United States, where it is a rare surname, and the United Kingdom, where it is a very rare surname.
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| Blackmar | United Kingdom, United States |
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wilmon w. blackmar Medal of Honor recipient and Commander-in-Chief of the Grand Army of the Republic (1841-1905), US (b. 1841) |
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frank w. blackmar American historian (1854-1931), US (b. 1854) |
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| esbon blackmar American politician, US (b. 1805) |
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| armand blackmar American music publisher (1826-1888), US (b. 1826) |
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phil blackmar professional golfer, US (b. 1957) |
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| charles blakey blackmar Recipient of the Purple Heart medal, US (b. 1922) |
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| elizabeth blackmar American historian and author |
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| blake blackmar football player (born 1995) (b. 1995) |
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Ann, Greg, Leah, Lori, Jane, Jack, Josh, John, Joan, Jody, Jeff, Tara, Todd, Nick, Eric, Erin, Faye, Fred, Marie, Marva, Melda, Sally, Gary, Sarah, Dawn, Ryan, Amy, Ben, Ray, Don, Guy, Jay, Joy, Ian, Mary, Mark, Sean, Carl, Beth, Keri, Kurt, Kyle, Knox, Paul, Rick, Rita, Ruth, Dean, and Shana