We are told that Datham & Abiram died together with their wives & sons during the rebellion including Korah.
Numbers 16:23-27 (KJV)
27 So they gat up from the tabernacle of Korah, Dathan, and Abiram, on every side: and Dathan and Abiram came out, and stood in the door of their tents, and their wives, and their sons, and their little children. 31 And it came to pass, as he had made an end of speaking all these words, that the ground clave asunder that was under them: 32 And the earth opened her mouth, and swallowed them up, and their houses, and all the men that appertained unto Korah, and all their goods.
Later in the book of Numbers it is reported that the children of Korah had not died in the rebellion,but nothing is said about his wife.
Numbers 26;10-11 (KJV)
10 And the earth opened her mouth, and swallowed them up together with Korah, when that company died, what time the fire devoured two hundred and fifty men: and they became a sign. 11 Notwithstanding the children of Korah died not.
Did the wife of Korah also die in the rebellion