Internal references help us locate the approximate date of composition of this book. The clause, "In those days there was no king in Israel,"(17:6; 18:1; 19:1; 21:25) suggests that someone wrote Judges during the monarchical period that followed the period of rule by judges (amphictyony). Someone probably wrote it after 1051 B.C. when Saul became king. However at the time of writing Jerusalem was still in the hands of the Jebusites (1:21). David captured Jerusalem about 1004 B.C. Therefore the writing of Judges seems to date between 1051 and 1004 B.C.
Jewish tradition suggests that Samuel wrote Judges.2This was the opinion of the writers of the Talmud, the collection of Jewish writings that grew up around revealed Scripture beginning very early in Israel's history. Samuel is a likely writer because of his role in Israel when someone wrote Judges. Samuel's ministry began about 1090 B.C. and apparently ended a few years before Saul's death (ca. 1021 B.C.). If Samuel wrote Judges, he probably did so between 1051 and about 1021 B.C.