Cognomen Otgonbaatar (Otgonbaatar 
) , globally, is quite a rare surname. The cognomen Otgonbaatar is characteristic of Mongolia, where it is quite a common surname, South Korea, where it is a rare surname, and the United States, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Eastern Asia, particularly Mongolia, South Korea, and China. Likewise, Otgonbaatar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Otgonbaatar | Germany, South Korea, United States, Mongolia, China |
| uuganbaataryn otgonbaatar Mongolian judoka, MN (b. 1988) |
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| sergelen otgonbaatar Mongolian basketball player, MN (b. 1989) |
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