The Muslim is the one following Islam. Islam means in Arabic full submission to God the one and only one God and means peace that is fulfilled by full submission to God. In this universal sense, the first Muslim is Adam (peace be upon him).
Prophet Muhammad (peace be upon him also is named in Quran as the first Muslim per Quran revelation to him by God through the angel Gabriel (Jibril).
Quran says (meaning English translation):
"Say (O Muhammad SAW): 'Shall I take as a Wali (helper, protector, etc.) any other than Allah, the Creator of the heavens and the earth? And it is He Who feeds but is not fed.' Say: 'Verily, I am commanded to be the first of those who submit themselves to Allah (as Muslims)'. And be not you (O Muhammad SAW) of the Mushrikun [polytheists, pagans, idolaters and disbelievers in the Oneness of Allah"
[Quran, Chapter 6, verse 14]
and Quran says also:
"Say (O Muhammad SAW): 'Verily, my Salat (prayer), my sacrifice, my living, and my dying are for Allah, the Lord of the 'Alamin (mankind, jinns and all that exists). (162) He has no partner. And of this I have been commanded, and I (Muhammad) am the first of the Muslims'."
[Quran, chapter 6, verses 162-163]
Adam; peace be upon him; is the first Muslim on earth.
The prophet Adam started the first Muslim ummah because he is the first Muslim human being
First duty of Muslim is to obey Allah .
first muslim advocate in malabar
when the first muslim government in subcontinent was stablished by
The first name indicates he is Muslim.
Adam was the first man in the Muslim creation story.
The city of Madina was the first Muslim settlement.
Adam (peace be upon him) is the first Muslim who started Muslim ummah or Muslim community. Refer to related question below.
Better avoid the Muslim.
Quba Mosque in Medina is considered the first mosque of Muslim to pray.
the first and least enduring Muslim intrusions, which came in 711.