Ian MacGregor (disambiguation)
Sir Ian MacGregor was a Scottish-American metallurgist and industrialist
Ian MacGregor, Macgregor or McGregor may also refer to:
- Ian McGregor (malariologist)
- Ian McGregor (Australian footballer), Australian rules footballer
- Ian McGregor (Scottish footballer)
- Ian Macgregor, British investment executive and chartered accountant
- Ian MacGregor (journalist), British newspaper editor
- Ian MacGregor (cyclist), American professional road racing
- Ian MacGregor (rugby union), Scottish rugby union player