Thomas Linton Metzger (April 9, 1938 – November 4, 2020) was an American white supremacist, neo-Nazi leader and Klansman. He founded White Aryan Resistance (WAR), a neo-Nazi organization, in 1983. He was a Grand Dragon of the Ku Klux Klan in the 1970s. Metzger voiced strong opposition to immigration to the United States, and was an advocate of the Third Position. He was incarcerated in Los Angeles County, California, and Toronto, Ontario, and was the subject of several lawsuits and government inquiries. He, his son, and WAR were found liable for a total of $12.5 million in damages as a result of the murder of Mulugeta Seraw, 28, an Ethiopian student, by skinheads in Portland, Oregon, affiliated with WAR.

Metzger was born and raised in Indiana. He served in the U.S. Army from 1961 until 1964 when he moved to Southern California to work in the electronics industry. For a short time, he was a member of the right-wing group the John Birch Society, and attended anti-communist luncheon meetings sponsored by the Douglas Aircraft Corporation. However, he eventually left the group when it rejected his antisemitic views.

By 1968, Metzger had moved to Fallbrook, California, and he supported independent George C. Wallace for president. Metzger stopped paying taxes in the 1970s, and by 1972 his tax protest over the Vietnam War had destroyed his thriving television business but introduced him to other tax protesters who, he said, were "atheist racists, Christian Identity racists, Nazis, all kinds of people."

From 1971 to 1980, Metzger was the pastor of a Christian Identity church.

During the 1970s, Metzger joined the Knights of the Ku Klux Klan, which was led by David Duke, and he eventually became the Grand Dragon of the State of California. Metzger's Klan organization also had a security force which was involved in confrontations with communists and anti-Klan protesters.

Metzger's branch of the Klan split from Duke's organization in 1980 to form the California Knights of the Ku Klux Klan. Also in 1979, he took Greg Withrow of the White Student Union "under his wing", which later became the Aryan Youth Movement (AYM), for youth associated with White Aryan Resistance.

In 1985, Metzger attended a Nation of Islam rally in San Diego, led by Louis Farrakhan. During the rally, he compared America to a "rotting carcass" and praised Farrakhan for "understanding" that Jews are "living off the carcass" and called them "parasites."

According to Stephen Atkins, author of The Encyclopedia of Right-Wing Extremism in Modern American History, Metzger's ideology "differs from other white supremacists by rejecting the basic tenets of the Christian Identity movement because he considers himself to be the champion of the Third Position. The Third Position is a form of racism that is oriented towards attracting the white working class and it is also anti-capitalist in orientation. Metzger believed that the United States should be divided into designated areas for different racial groups except Asian Americans, who should be expelled from the United States." In 1988, Metzger recorded this message on his WAR Hotline: