According to the book of Daniel, the antichrist will come out of the last kingdom.
"Thus he said:‘The fourth beast shall be
A fourth kingdom on earth,
Which shall be different from all other kingdoms,
And shall devour the whole earth,
Trample it and break it in pieces.
The ten horns are ten kings
Who shall arise from this kingdom.
And another shall rise after them;
He shall be different from the first ones,
And shall subdue three kings.
He shall speak pompous words against the Most High,
Shall persecute the saints of the Most High,
And shall intend to change times and law.
Then the saints shall be given into his hand
For a time and times and half a time.
‘But the court shall be seated,
And they shall take away his dominion,
To consume and destroy it forever.
Then the kingdom and dominion,
And the greatness of the kingdoms under the whole heaven,
Shall be given to the people, the saints of the Most High.
His kingdom is an everlasting kingdom,
And all dominions shall serve and obey Him.’
The Roman empire was the last kingdom. I do not assume to know what it will be like in it's final form, but he will arise out of that.
If you look at prophecies later, you will see that there is a great army from the south which the antichrist will devastate, I have recently entertained the idea that that particular army will be Muslims. The reason being is that they would never accept anyone other than a muslim declaring himself to be god. And although he will be an enemy of the jchristians (as they themselves are) he will not be muslim and will be perceived by them as a threat.
I am definitely up for alternative ideas about it though.