The author of Acts tends to exaggerate, part of his style (hyperbole).
2:5 Jews of every nation under the heavens.
2:44 All who believed lived together
4:47 having favor with the whole people
9:35 All the inhabitants of Lydda and Sharon who saw him turned to the Lord
13:44 on the coming sabbath almost all the town (gather to the synagogue, must have been a big one)
19:10 so that all the inhabitants of Asia, Jews and Greeks alike, heard about the word of the Lord.
19:27 she whom all Asia and the whole world worship
21:21 that you teach all the Jews who live among Gentiles to abandon Moses
25:24 He it is about whom the whole Jewish community has appealed to me, both here and in Jerusalem
26:20 to all the country of Judea (Paul's teaching mission)
So things should not be taken literally, but a point was being made: a lot.