| Birth Date: | 31 January 1994 |
| Birth Place: | Ulaanbaatar |
| Height: | 184 cm |
| Weight: | 135 kg |
| Weight Class: | +100 kg |
| Club: | Mongolian military |
| Worlds Rank: | 3 |
| Worlds Year: | 2018 |
| Worlds Weight: | Men's +100 kg |
| Regionals Type: | AS |
| Regionals Rank: | 2 |
| Regionals Year: | 2014 |
| Regionals Weight: | Men's +100 kg |
| Regionals Year2: | 2018 |
| Regionals Weight2: | Men's +100 kg |
| Olympics Rank: | R32 |
| Olympics Year: | 2020 |
| Olympics Weight: | Men's +100 kg |
| Highestranking: | 2 (2017) |
| Updated: | 23 May 2023 |
Ölziibayaryn Düürenbayar or Ulziibayar Duurenbayar (Mongolian: Өлзийбаярын Дүүрэнбаяр; born 31 January 1994) is a Mongolian judoka.[1]
Ölziibayaryn participated at the 2018 World Judo Championships, winning a medal in the +100 kg division.[2]