Heather McDonald (born 1970) is an American actress, comedian and author.

Heather McDonald or Mac Donald may also refer to:

• Heather McDonald (playwright) (born 1959), American playwright, director, librettist, and professor
• Heather McDonald (rugby union), Canadian rugby union player
• Heather Mac Donald (born 1956), American political commentator, essayist, and attorney
• Heather Lyn MacDonald, American film director and producer

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