How many names of Allah are mentioned in the Holy Quran?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

Different scholars tried to determine the Names of Allaah which are mentioned in the Quran and the Sunnah. For instance, Shaykh Ibn 'Uthaymeen stated 99 names which he extracted from the Quran and the Sunnah, and they are as follows:

1-    The Names of Allaah which are mentioned in the Quran (81 Names):

- Allaah, Al-Ahad, Al-A'la, Al-Akram, Al-Ilaah, Al-Awwal, Al-Aakhir, Ath-Thaahir, Al-Baatin, Al-Baari', Al-Barr, Al-Baseer, At-Tawwaab, Al-Jabbaar, Al-Haafith, Al-Haseeb, Al-Hafeeth, Al-Hafiyy, Al-Haqq, Al-Mubeen, Al-Hakeem, Al-Haleem, Al-Hameed, Al-Hayy, Al-Qayyoom, Al-Khabeer, Al-Khaaliq, Al-Khallaaq, Ar-Ra'oof, Ar-Rahmaan, Ar-Raheem, Ar-Razzaaq, Ar-Raqeeb, As-Salaam, As-Samee', Ash-Shaakir, Ash-Shakoor, Ash-Shaheed, As-Samad, Al-'Aalim, Al-'Azeez, Al-'Atheem, Al-'Afuw, Al-'Aleem, Al-'Aliyy, Al-Ghaffaar, Al-Ghafoor, Al-Ghaniyy, Al-Fattaah, Al-Qaadir, Al-Qaahir, Al-Quddoos, Al-Qadeer, Al-Qareeb, Al-Qawiyy, Al-Qahhaar, Al-Kabeer, Al-Kareem, Al-Lateef, Al-Mu'min, Al-Muta'aali, Al-Mutakabbir, Al-Mateen, Al-Mujeeb, Al-Majeed, Al-Muheet, Al-Musawwir, Al-Muqtadir, Al-Muqeet, Al-Malik, Al-Maleek, Al-Mawla, Al-Muhaymin, An-Naseer, Al-Waahid, Al-Waarith, Al-Waasi', Al-Wadood, Al-Wakeel, Al-Waliyy, Al-Wahhaab.

2-    The names of Allaah which are mentioned in the Sunnah of the Prophet (18 Names):

-Al-Jameel, Al-Jawaad, Al-Hakam, Al-Hayiyy, Ar-Rab, Ar-Rafeeq, As-Sabooh, As-Sayyid, Ash-Shaafi, At-Tayyib, Al-Qaabidh, Al-Baasit, Al-Muqadim, Al-Mu’akhkhir, Al-Muhsin, Al-Mu'ti, Al-Mannaan, Al-Witr.

Finally, it should be mentioned that other scholars mentioned other Names, and that these Names are some of the Names of Allaah and not all of them. The evidence for this is the saying of the Prophet : “O Allaah! I ask You by every Name belonging to You, which You Named Yourself with, or Revealed in Your Book, or You Taught to any of Your Creation, or You have Preserved in the knowledge of the unseen with You,…” [Ahmad] Of course, no one can know the Names which Allaah Preserved in the knowledge of the unseen.