Kildi Beg (Turki/Kypchak: کلدی بک; died 1362) was Khan of the Golden Horde from 1361 to 1362, having replaced his rival Ordu Malik.
Whoever he was, the pretended Kildi Beg attested in contemporary evidence appears to have emerged as a claimant to the throne of the Golden Horde in 1361, when it was contested among Khiḍr Khan's son Timur Khwaja and brother Murād (or Mürid), and their rival Ordu Malik.
Kildi Beg proceeded to eliminate a number of high officials, including the former beglerbeg Mogul Buqa; whether he did so in the manner described by Naṭanzī or not, his cruelty is also mentioned in the Russian chronicles.
In the process, he seems to have lost some of his supporters, including Mamai, who returned to his base in the area of the Crimea and proclaimed a khan of his own, ʿAbdallāh.
The appearance of Kildi Beg's name on coins minted at Yangishehr (perhaps Old Orhei in Bessarabia) in the year of the Hijra 765 (= AD 10 October 1363 – 27 September 1364) and at Azaq in the year of the Hijra 767 (September 1365-September 1366), has been interpreted as indicating Kildi Beg's survival after his defeat and loss of Sarai.