How many people likely heard Peter's sermon at Pentecost?

At Pentecost, Peter likely addressed thousands of Jews gathered in the temple complex, since the Feast drew people from every nation under heaven. The context indicates he was not speaking to just 40 or 50 people but probably thousands.

Les explains that Peter isn't just talking to 40 or 50 people; he's probably got thousands out in front of him in the whole temple complex. This is the Feast of Pentecost, and Jews have come from every nation under heaven. After hearing that they crucified their promised Messiah, they are pricked in their heart and ask Peter and the rest of the apostles what they should do. Les notes Peter is addressing this great crowd of Jews on covenant ground.

How large was the crowd Peter preached to in Acts 2?

Peter preached to a great crowd of Jews at Pentecost, likely numbering thousands rather than merely 40 or 50. They had gathered in the whole temple complex from every nation under heaven. After hearing that they had crucified their promised Messiah, they were pricked in their heart and asked what they should do.