Which is the capital of Israel's nation in the bible?

Answer 1

Kings of Israel reigned in "Samaria." The kings of the Jews [Judah; David, Solomon, etc] reigned in "Jerusalem."

"Now Jehoram the son of Ahab began to reign over Israel in Samaria the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years." (II Kings 3:1)

"In the three and twentieth year of Joash the son of Ahaziah king of Judah Jehoahaz the son of Jehu began to reign over Israel in Samaria..." (II Kings 13:1)

"The the king of Assyria came up throughout the land, and went up to Samaria, and besieged it three years. In the ninth year of Hoshea the king of Assyria took Samaria, and carried Israel away into Assyria, and placed them in Halah and in Habor by the river of Gozan, and in the cities of the Medes. For so it was, that the children of Israel had sinned against the Lord their God, which had brought them up out of the land of Egypt, from under the hand of Pharaoh king of Egypt, and had feared other gods, and walked in the statutes of the heathen, whom the Lord cast out from before the children of Israel, and of the kings of Israel, which they had made. (II Kings 17:5-8)

"...the Lord removed Israel out of His sight, as He had said by all His servants the prophets. So was Israel carried away out of their own land to Assyria unto this day. And the king of Assyria brought men from Babylon, and from Cuthah, and from Ava... and placed them in the cities of Samaria instead of the children of Israel: and they possessed Samaria, and dwelt in the cities thereof. (II Kings 17:23-24)

"Shall I not, as I have done unto Samaria and her idols, so do to Jerusalem and her idols?" (Isa.10:11)