Samuel Kibathi Wanjiru (born 23 February 2005) is a Kenyan long distance and cross country runner.

[1] Originally from Nyandarua County,[2] he attended Kurashiki High School in Japan.

[3] Kibathi won the 5000 metres Kenyan national U20 world championship trials in a time of 13:47.86 in July 2022.

[7] He was a bronze medalist in the 10,000 metres at the 2023 African U18 and U20 Championships in Athletics in Ndola.

[9][10] On 30 March 2024, he won gold in the U20 individual and in the team U20 race at the 2024 World Athletics Cross Country Championships in Serbia.