According to the Bible, Rebekah married Isaac when she was relatively young. In Genesis 24:16, it is mentioned that when Abraham's servant, who was sent to find a wife for Isaac, encountered Rebekah, she was referred to as a young virgin.
Later, in Genesis 24:67, it is stated that Isaac took Rebekah into his mother Sarah's tent, and he married her. However, the exact age of Rebekah at the time of her marriage to Isaac is not explicitly mentioned in the biblical text.
In some historical Jewish tradition, it is believed that Rebekah might have been around the age of 14 when she married Isaac, but this is based on interpretations and not explicit biblical information. It's important to note that customs and traditions regarding marriage ages were different in ancient times compared to modern practices.