Who is the youngest out of the 12 sons of Jacob?

Benjamin was Jacob's youngest son. (See Genesis 29:31-30:24, 35:16-18). Only Benjamin was born in the land of Canaan.

The order of their Jacob's sons from oldest to youngest is the following:

1. Reuben
2. Simeon
3. Levi
4. Judah
5. Dan
6. Naphtali
7. Gad
8. Asher
9. Issachar
10. Zebulun
11. Joseph
12. Benjamin