B48 may refer to:

• B48 (New York City bus), a bus line in Brooklyn
• HLA-B48, a HLA-B serotype
• Martin XB-48, an American aircraft
• BMW B48 Engine, an engine BMW AG produces.

• E-GMS
• EGMS
• E. G. Murphy
• EGM²
• EGN
• Egn
• Egna
• EGNA
• Egnach
• Egnach, Switzerland
• Egnach TG
• Egnach (Thurgau)
• Egnar
• Egnar, Colorado
• Egnater
• Egnatia
• Egnatia, Ioannina
• Egnatia Mariniana
• Egnatian Way
• Egnatia Odos
• Egnatia Odos (modern road)
• Egnatia, Thessaloniki
• Egnatio Danti
• Egnatius
• Egna Trophy