Family name St Aubyn (St Aubyn 
) , globally, is a rare last name. The cognomen St Aubyn is characteristic of Portugal, where it is a very rare surname, the United Kingdom, and Australia. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Australia. Much less frequently, St Aubyn is the forename as well as the last name.
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| St Aubyn | Australia, Jamaica, Canada, United States, United Kingdom |
| john st aubyn English politician (b. 1610) |
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| john st aubyn English Member of Parliament (1645-1687) (b. 1645) |
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| john st aubyn English Member of Parliament (1670-1715) (b. 1670) |
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| sir john st aubyn, 3rd baronet British politician (b. 1696) |
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sir john st aubyn, 5th baronet High Sheriff of Cornwall (1758-1839) (b. 1758) |
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| john st aubyn British Member of Parliament (1726-1772) (b. 1726) |
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| john st aubyn, 1st baron st levan British politician (b. 1829) |
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| john townshend st aubyn, 2nd baron st levan British Army officer and peer (b. 1857) |
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edward st aubyn British writer, GB (b. 1960) |
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| john st aubyn British politician (1919-2013), GB (b. 1919) |
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| nick st aubyn British politician (born 1955), GB (b. 1955) |
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Ed, Steven, Archie, Karine, Rodney, Ronald, Rupert, Denise, Louise, Travis, Edward, Megghan, Michael, Anthony, Chantal, Kristin, Danelda, Jessica, Nicolle, Zachary, Margaret, Jeanesse, Sierra, Jeanerre, Sandra, Nancy, Ann, Ben, Paul, Dawn, Donn, Lisa, John, Joan, Vera, Zach, Mandy, Susan, Suzie, Cheri, Carla, Colin, Randy, Diana, Donna, James, Julie, Wayne, and Nicholas