Margaret Ellen Noonan (born September 7, 1950), known as Peggy Noonan, is a weekly columnist for The Wall Street Journal, and contributor to NBC News and ABC News. She was a primary speechwriter and Special Assistant to President Ronald Reagan from 1984 to 1986 and has maintained a center-right leaning in her writings since leaving the Reagan administration. Five of Noonan's books have been New York Times bestsellers.

Noonan was nominated for an Emmy Award for her work on America: A Tribute to Heroes.