Eastleigh is a town in Hampshire, England.

Eastleigh may also refer to:

• Eastleigh, the town in Hampshire, England.
  • Borough of Eastleigh, local government area around the town
  • Eastleigh F.C.
  • Eastleigh (UK Parliament constituency)
• Eastleigh, Devon, a location in North Devon, England
• Eastleigh, Nairobi, Kenya, eastern suburb of the city
  • RAF Eastleigh, former airbase in the suburb
• East Leigh, Mid Devon, England
• Astley, Greater Manchester, England