The Book of Ezra is a book of the Hebrew Bible. Originally combined with the Book of Nehemiah in a single book of Ezra-Nehemiah, the two became separated in the early centuries of the Christian era. Its subject is the Return to Zion following the close of the Babylonian captivity, and it is divided into two parts, the first telling the story of the first return of exiles in the first year of Cyrus the Great (538 BCE) and the completion and dedication of the new Temple in Jerusalem in the sixth year of Darius (515 BCE), the second telling of the subsequent mission of Ezra to Jerusalem and his struggle to purify the Jews from the sin of marriage with non-Jews. Together with the Book of Nehemiah, it represents the final chapter in the historical narrative of the Hebrew bible.

Ezra is written to fit a schematic pattern in which the God of Israel inspires a king of Persia to commission a leader from the Jewish community to carry out a mission; three successive leaders carry out three such missions, the first rebuilding the Temple, the second purifying the Jewish community, and the third sealing of the holy city itself behind a wall. (This last mission, that of Nehemiah, is not part of the Book of Ezra.) The theological program of the book explains the many problems its chronological structure presents. It probably appeared in its earliest version around 400 BCE, and continued to be revised and edited for several centuries after before being accepted as scriptural around the time of Christ.

Ezra ( /ˈɛzrə/; Hebrew: עזרא, Ezra; fl. 480–440 BC), also called Ezra the Scribe (Hebrew: עזרא הסופר, Ezra ha-Sofer) and Ezra the Priest in the Book of Ezra. According to the Hebrew Bible he returned from the Babylonian exile and reintroduced the Torah in Jerusalem (Ezra 7-10 and Neh 8). According to First Esdras, a non-canonical Greek translation of the Book of Ezra, he was also a high priest.

His name may be an abbreviation of Azaryahu, "God-helps". In the Greek Septuagint the name is rendered Esdras (Greek: Ἔσδρας), from which Latin: Esdras.

The Book of Ezra describes how he led a group of Judean exiles living in Babylon to their home city of Jerusalem (Ezra 8.2-14) where he enforced observance of the Torah and cleansed the community of mixed marriages.

Ezra, known as "Ezra the scribe" in Chazalic literature, is a highly respected figure in Judaism.

The canonical Book of Ezra and Book of Nehemiah are the oldest sources for the activity of Ezra, whereas many of the other books ascribed to Ezra (First Esdras, 3-6 Ezra) are later literary works dependent on the canonical books of Ezra and Nehemiah.