Marilyn Hagerty (née Hansen; born May 30, 1926) is an American newspaper columnist writing for the Grand Forks Herald. She has been with the paper since 1957, when her husband, Jack Hagerty (1918–1997), became editor of the paper.

She garnered a measure of fame in March 2012 when her review of a new Olive Garden restaurant in Grand Forks, North Dakota, was noticed by online news aggregators and became an overnight sensation among both critics and admirers. Anthony Bourdain announced plans to collaborate with Hagerty and subsequently published and wrote a foreword for her 2013 book Grand Forks: A History of American Dining in 128 Reviews.

Hagerty was awarded the 2012 Al Neuharth Award for Excellence in the Media. In 2017, she received the UND Spirit Award, bestowed by the UND Alumni Association and Foundation.

Hagerty was awarded an honorary degree from the University of North Dakota in Grand Forks, North Dakota in 2021.

She appeared as a guest Quickfire Challenge judge on Top Chef: Seattle "Even the Famous Come Home".

In September 2021, aged 95, she was reported to be recovering from an unspecified medical procedure.