Sector 3, Sector III or variants may refer to:

• Sector 3 (Bucharest), an administrative sector of Bucharest, Romania
• A sector of Dwarka Sub City, Delhi, India
• A sector of Rohini Sub City, Delhi, India
• A sector of Vashi, India
• Sector III, a neighbourhood in Getafe, Spain

• A sector of the United Nations Mission in Liberia
• A defence sector of the Bangladesh Armed Forces

• Part of a holding pattern
• A sector of Anchorage Air Route Traffic Control Center coverage area
• A sector of London Area Control Centre coverage area

• "Sector 3", a 1996 single by Ed Rush
• Sector3 Studios, a Swedish video game developer

• Sector (disambiguation)
• Third sector (disambiguation)
• District 3 (disambiguation)
• Area 3 (disambiguation)
• Sector 36, a sector of Noida, Uttar Pradesh, India
  • Sector 36, a 2024 Indian crime thriller film about the 2006 Noida serial murders
• Sector 34 (Kharghar) metro station, of the Navi Mumbai Metro in India
• Sector 37 (Gurugram) metro station, of the Delhi Metro in India

This disambiguation page lists articles associated with the title Sector 3.
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