Berihu Aregawi Teklehaimanot (; born 28 February 2001) is an Ethiopian long-distance runner and the current world record holder in the 5000 m road race and the 10,000 m road race. At the Paris 2024 Olympics, Berihu won a silver medal in the 10,000 m, and he placed fourth in the 10,000 m at the 2020 Tokyo Olympics. Berihu won a silver medal at the 2023 World Athletics Cross Country Championships. He also won a silver medal in the 3,000 m at the 2025 World Athletics Indoor Championships.
At age 17, Berihu won a bronze medal in the 10,000 m at the 2018 World Under-20 Championships.
In November 2019, Berihu won the Great Ethiopian Run (10 kilometres road race).
On 31 December 2021, Berihu set a world record in the 5 km run at the Cursa dels Nassos 5K in Barcelona in a time of 12 minutes 49 seconds, improving previous mark of Joshua Cheptegei by 2 seconds. He had 38 second margin of victory.
In March 2023, he ran 26:33 at the 10 km race in Laredo, Spain, the second fastest 10k of all time.
He ran the fifth-fastest track 5000m time in history when running 12:40.45 to win the Diamond League event in Lausanne in June 2023.
In the 10,000m race at the 2023 World Athletics Championships in Budapest, he placed fourth.
At the 2024 Paris Olympics, Berihu secured a silver medal in the 10,000 metres, running 26:43.44 behind Joshua Cheptegei new Olympic record of 26:43.14.
At the 2024 Silesia Diamond League, Berihu competed in the 3000 metres, running 7:21.28 behind Jakob Ingebrigtsen's new world record of 7:17.55. This time places Berihu as the third fastest 3000 metre runner in history, behind Daniel Komen, who held the previous world record of 7:20.67, and Ingebrigtsen.
Be ran a meeting record of 12:50.45 to win the 5000 metres at the 2025 Shanghai Diamond League ahead of compatriot Kuma Girma. He finished second in the 10,000 metres at the 2025 Prefontaine Classic on 5 July, in a race that doubled up as the Ethiopian trials for the 2025 World Championships. In September 2025, he competed over 10,000 metres at the 2025 World Championships in Tokyo, Japan, finishing in twelfth place.
| 2018 | World U20 Championships | Tampere, Finland | 3rd | 10,000 m | 27:48.41 |
| African Youth Games | Algiers, Algeria | 1st | 3000 m | 7:50.98 | |
| Youth Olympic Games | Buenos Aires, Argentina | 2nd | 3000 m + XC | 4 pts | |
| 2021 | Olympic Games | Tokyo, Japan | 4th | 10,000 m | 27:46.16 |
| 2022 | World Indoor Championships | Belgrade, Serbia | 23 (h) | 3000 m | 7:58.59 |
| World Championships | Eugene, United States | 7th | 10,000 m | 27:31.00 | |
| 2023 | World Cross Country Championships | Bathurst, Australia | 2nd | Senior race | 29:26 |
| 2nd | Team | 32 pts | |||
| World Championships | Budapest, Hungary | 8th | 5000 m | 13:12.99 | |
| 4th | 10,000 m | 27:55.71 | |||
| 2024 | Olympic Games | Paris, France | 2nd | 10,000 m | 26:43.44 |
| 2025 | World Indoor Championships | Nanjing, China | 2nd | 3000 m | 7:46.25 |
| World Championships | Tokyo, Japan | 12th | 10,000 m | 29:02.02 |
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