Mary A. Anderson is the pseudonym that was used by an unknown woman who died by suicide in a Seattle, Washington, hotel room in October 1996.

[1] On October 9, the woman reserved a room by telephone at the Hotel Vintage Park, 1100 5th Avenue, about 90 minutes before checking in.

In the hotel's register, she entered the name "Mary A. Anderson," along with a New York City address and a telephone number, all of which investigators later determined to be false.

The Medical Examiner later determined she had consumed a lethal amount of cyanide and ruled her death a suicide.

[5] In 2023, advanced DNA testing suggested that her biogeographical origins connected to Eastern Iran or Afghanistan, with some likely Persian heritage.