National Grid or National grid may refer to:

• Electrical grid, an interconnected network for delivering electricity
  • National Grid (Great Britain), the electricity transmission network of Great Britain
    • National Grid plc, a utilities company based in the UK that also operates in the northeastern United States
  • National Grid (India), the electricity transmission network of India
  • National Grid (Malaysia), the electricity transmission network of Malaysia
  • National Grid (New Zealand), the electricity transmission network of New Zealand

• National grid reference system, a national geographical coordinate system for mapping
  • Ordnance Survey National Grid, used in Great Britain
  • Irish national grid reference system
  • United States National Grid

• National Grid for Learning, a former government funded educational program in the UK

• Power Grid Corporation of India
• State Grid Corporation of China