premillennialism in the early church

Here are some early Christian writers who held to premillennialism:

Clement of Rome (c. 30-95AD)
Of a truth, soon and suddenly shall His will be accomplished, as the Scriptures also bear witness, saying, 'Speedily will He come, and will not tarry,' and the Lord shall suddenly come to His temple, even the Holy one, for whom ye look (First Letter to the Corinthians, 23).

Let us then wait for the kingdom of God from hour to hour in love and righteousness, seeing that we know not the day of the appearing of God (Second Letter to the Corinthians, 12).

Didache (c.100AD)
And then shall appear the signs of the truth; first, the sign of an outspreading in heaven; then the sign of the sound of the trumpet; and the third, the resurrection of the dead; yet not of all (16:6-7).

Shepherd of Hermas (c.140-150AD)
You have escaped from great tribulation on account of your faith, and because you did not doubt the presence of such a beast. Go, therefore, and tell the elect of the Lord His mighty deeds, an say to them that this beast is a type of the great tribulation that is coming (Visions, 1.4.2).

Polycarp (c.70-155AD)
If we please Him in this present age, we shall receive also the age to come, according as He promised to us that He will raise us from the dead, and that if we live worthily of Him, 'we shall also reign with Him.'

Adapted from Zuck, Basic Bible Interpretation, 233.