Caleb Mwangangi Ndiku (born 9 October 1992 in Machakos) is a Kenyan middle- and long-distance runner.
Born in Machakos, he was the son of a javelin thrower, David Ndiku, but he decided not to follow his father and focused on running instead. He began his career in domestic cross country running competitions and at the Athletics Kenya series meeting in Meru, he took fifth place in the junior men's race at the age of sixteen. He won selection for the 2009 World Youth Championships in Athletics with a personal best run in the 1500 metres at the Kenyan youth trials. At the championships in Brixen, he ran 3:38.42 to win the silver medal behind compatriot Gideon Kiage Mageka. Ndiku returned to the Kenyan cross country circuit at the end of the year, and finished fourth at another Athletics Kenya series race in Nairobi.
Ndiku earned himself a place on the Kenyan junior men's team for the 2010 IAAF World Cross Country Championships with a third place finish in the junior race at the Kenya National Cross Country Championships. In the world junior men's race in Bydgoszcz the following month, he formed part of the leading pack before quickening the pace to establish a significant lead. He won the junior title and also headed the Kenyan runners to the team gold as the country grabbed the top four spots. Ndiku took his second title of the year at the 2010 World Junior Championships in Athletics, where he ran a personal best of 3:37.30 minutes to win the 1500 m world junior crown. He won the Most Promising Kenyan Sportsman of the Year award at the end that December.
He began competing in senior competitions the following year and was runner-up at the Trofeo Alasport cross country in March, second only to the newly elected world champion Imane Merga.
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- ^ The Standard, December 11, 2010: Rudisha and Lagat crowned Soya best athletes
- ^ Sampaolo, Diego (2011-03-28). Another cross country win for World champion Merga - Alà dei Sardi report. IAAF. Retrieved on 2011-03-29.