Noujaim is a Lebanese Maronite Christian last name. Notable people with the surname include:

• Fares D. Noujaim, Lebanese-American investment banker
• Guy-Paul Noujaim, (born 1935), Lebanese Maronite Catholic eparch and Emeritus Auxiliary Bishop
• Jehane Noujaim, (born c. 1980), Egyptian-American documentary film director of Lebanese origin
• Selim Noujaim, American politician, member of the Connecticut House of Representatives

• Microraion
• Micro-Raman spectroscopy
• Microrapter
• Microraptor gui
• Microraptoria
• Microrasbora
• Microrasbora sp "galaxy"
• Microrayon
• Microreaction
• Microreaction technology
• Microregion
• Micro-region
• Microregion of Anicuns
• Micro-region of Anápolis
• Microregion of Anápolis
• Microregion of Aragarças
• Microregion of Bananal
• Microregion of Campanha Ocidental
• Microregion of Caraguatatuba
• Microregion of Catalão
• Micro-region of Catalão
• Microregion of Ceres
• Microregion of Chapada dos Veadeiros
• Microregion of Goiânia
• Microregion of Guaratinguetá