MIB1 may refer to:

• MIB1, a gene that regulates apoptosis.
• MIB-1, an antibody against Ki-67, a protein expressed in proliferating cells.

• Gordon Hitt Farmstead
• Gordon H. Mueller
• Gordon Hodson
• Gordon Hogg
• Gordon Holmes Alexander MacMillan
• Gordon Holmes MacMillan
• Gordon Holt
• Gordon Honeycomb
• Gordon Hope Grant
• Gordon Horsfield
• Gordon Hotel
• Gordon Hotels
• Gordon Howard Eliot Hodgkin
• Gordon Howard Hodgkin
• Gordon H. Pettengill
• Gordon H. Whitlow
• Gordonia alkaliphila
• Gordonia alkalivorans
• Gordonia alkanivorans
• Gordonia araii
• Gordonia caeni
• Gordoniaceae
• Gordonia chilaunia
• Gordonia cholesterolivorans
• Gordonia defluvii