Cognomen Otgontsetseg (Otgontsetseg 
, Отгонцецег 
, Отгонцэцэг 
) , around the world, is a rare surname. The cognomen Otgontsetseg is habitual in Mongolia, where it is quite a common surname, China, where it is an extremely rare surname, and the United States. Also, Otgontsetseg is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Otgontsetseg | China, Mongolia, United States, Canada |
| Отгонцецег | Ukraine |
| Отгонцэцэг | Russia |
| lkhagvasürengiin otgontsetseg volleyball player (b. 1990) |
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| galbadrakh otgontsetseg Mongolian-Kazakhstani judoka, MN (b. 1992) |
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