Nguyen Quoc Quan (Vietnamese: Nguy?n Qu?c Quân, born November 20, 1953) is a Vietnamese-born American mathematics researcher and human rights activist and a member of the leadership committee of the organization Viet Tan.
He has been detained since April 17, 2012 after arriving at Tan Son Nhat airport in Ho Chi Minh City, Vietnam.
On April 28, 2012, Vietnam's state media reported the pro-democracy activist has been arrested and accused of organizing "terrorism" activities.
Previously, Dr Quan was arrested in Ho Chi Minh City in Vietnam on a trip on November 17, 2007 for preparing pro-democracy flyers.
During that first trip, he brought in a Vietnamese translation of the book From Dictatorship to Democracy about nonviolent resistance.
He stood trial in Vietnam on May 13, 2008 on charges of "terrorism" and was sentenced to 6 months in prison.
He was eventually released on May 17, 2008 and returned to his home in Elk Grove, California to his wife and two teenage sons.
In 2012, he was re-arrested on another trip to Vietnam, and held in prison for 9 months.
Following intense US pressure, he was deported on January 30, 2013.