Boso may refer to:
- Boso of Merseburg (d. 970), German bishop
- Boso of Provence, Frankish nobleman and king
- Boso the Elder, a Frank from the Bosonid dynasty
- Boso of Tuscany (885–936), Italian nobleman
- Cap Boso (b. 1963), American football player
- Cardinal Boso, (d. c1181), third English Cardinal
- Bōsō Peninsula, peninsula in Chiba prefecture, Honshū, Japan
- Boso (Gojjam), a historic marketplace in the Gojjam region of Ethiopia
- Boso, Ghana, a village in the Asuogyaman District of the Eastern Region of Ghana.
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