Bihar may refer to:

Places

• Bihar a state in India
• Bihar River, India
• Bihar (county), a historic county of the Kingdom of Hungary
• Hajdú-Bihar, county in Hungary
• Bihar, the Hungarian name of the Romanian Bihor County
• Bihar Sharif - headquarters of Nalanda district. Also referred to as Bihar by some
• Koch Bihar, a princely state in North-east India

Other

• Bihar al-Anwar, hadith compilation by Allamah Majlisi
• Bihar (king), a khagan of the Khazars
• Behar, a portion in the annual Jewish cycle of Torah reading, the second in the book of Deuteronomy

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