Ahmad Tajuddin Halim Shah I of Kedah

Paduka Sri Sultan Ahmad Tajuddin Halim Shah I ibni al-Marhum Sultan Abdullah Mu'adzam Shah (Jawi: ڤدوك سري سلطان أحمد تاج الدين حليم شاه ١ ابن المرحوم سلطان عبد الله معظم شاه; died 15 February 1710) was the 18th Sultan of Kedah and reigned from 1706 to 1710. He was appointed as heir apparent with the title of Raja Muda, after his elder brother, Tunku Muhammad Jiwa left for Sumatra.