Darius in the Bible

1. The Mede, king of Persia

Daniel 5:31 And Darius the Median took the kingdom, being about threescore and two years old.
Daniel 6 It pleased Darius to set over the kingdom an hundred and twenty princes, which should be over the whole kingdom; 2 And over these three presidents; of whom Daniel was first: that the princes might give accounts unto them, and the king should have no damage. 3 Then this Daniel was preferred above the presidents and princes, because an excellent spirit was in him; and the king thought to set him over the whole realm. 4 Then the presidents and princes sought to find occasion against Daniel concerning the kingdom; but they could find none occasion nor fault; forasmuch as he was faithful, neither was there any error or fault found in him. ...
Daniel 9:1 In the first year of Darius the son of Ahasuerus, of the seed of the Medes, which was made king over the realm of the Chaldeans;

⇒Bible Encyclopedia for DARIUS.

2. King of Persia

Emancipates the Jews

Ezra 5 Then the prophets, Haggai the prophet, and Zechariah the son of Iddo, prophesied unto the Jews that were in Judah and Jerusalem in the name of the God of Israel, even unto them. 2 Then rose up Zerubbabel the son of Shealtiel, and Jeshua the son of Jozadak, and began to build the house of God which is at Jerusalem: and with them were the prophets of God helping them. 3 At the same time came to them Tatnai, governor on this side the river, and Shetharboznai, and their companions, and said thus unto them, Who hath commanded you to build this house, and to make up this wall? 4 Then said we unto them after this manner, What are the names of the men that make this building? ...
Ezra 6 Then Darius the king made a decree, and search was made in the house of the rolls, where the treasures were laid up in Babylon. 2 And there was found at Achmetha, in the palace that is in the province of the Medes, a roll, and therein was a record thus written: 3 In the first year of Cyrus the king the same Cyrus the king made a decree concerning the house of God at Jerusalem, Let the house be builded, the place where they offered sacrifices, and let the foundations thereof be strongly laid; the height thereof threescore cubits, and the breadth thereof threescore cubits; 4 With three rows of great stones, and a row of new timber: and let the expences be given out of the king's house: ...
Haggai 1:1 In the second year of Darius the king, in the sixth month, in the first day of the month, came the word of the LORD by Haggai the prophet unto Zerubbabel the son of Shealtiel, governor of Judah, and to Joshua the son of Josedech, the high priest, saying,
Haggai 1:15 In the four and twentieth day of the sixth month, in the second year of Darius the king.
Zechariah 1:1 In the eighth month, in the second year of Darius, came the word of the LORD unto Zechariah, the son of Berechiah, the son of Iddo the prophet, saying,

3. The Persian

Nehemiah 12:22 The Levites in the days of Eliashib, Joiada, and Johanan, and Jaddua, were recorded chief of the fathers: also the priests, to the reign of Darius the Persian.