One of the "uttermost cities" of Judah, afterwards given to Simeon (Josh. 15:21, 32; 19:7; 1 Chronicles 4:32). In Josh. 15:32 Ain and Rimmon are mentioned separately, but in 19:7 and 1 Chr. 4:32 the two words are probably to be combined, as forming together the name of one place, Ain-Rimmon = "the spring of the pomegranate" (compare Nehemiah 11:29). It has been identified with Um er-Rumamin, about 13 miles south-west of Hebron.
The Rock of Rimmon, where the Benjamites fled (Judges 20:45, 47; 21:13), and where they maintained themselves for four months after the battle at Gibeah. It is the present village of Rammun, "on the very edge of the hill country, with a precipitous descent toward the Jordan valley," supposed to be the site of Ai.