How many believers were there in the upper room after Jesus' earthly ministry?

After Jesus' earthly ministry, only 120 Jewish believers were gathered in the upper room in Acts chapter 1. This small number stood in the Jerusalem and Judea area, though perhaps a few more existed in Galilee. It highlights how few believed before the Church Age.

Les explains that in Christ's earthly ministry, at least in Jerusalem and Judea, the believers accumulated in the upper room in Acts chapter 1 numbered 120. He calls it shocking that after three years of the Lord's own earthly ministry there were only 120 Jewish believers. He notes there may have been a few up in Galilee, but in the Jerusalem area there must not have been any more than these 120. This small number contrasts with the millions brought in through the last 1900 years of preaching the Gospel of Grace.

Acts 1

Were there more believers in Jerusalem than the 120 in the upper room?

No. According to the context, after three years of the Lord's earthly ministry there were only 120 Jewish believers gathered in the upper room in Acts chapter 1. In the area of Jerusalem and Judea, there must not have been any more than these 120, though a few may have been in Galilee.