The National Policy Institute (NPI) was a white supremacist think tank and lobbying group based in Alexandria, Virginia.

[13][14] By early 2017, the NPI had leased a townhouse office space on King Street in Old Town Alexandria, Virginia, where it maintains its headquarters today.

[16] In December 2013, NPI launched a website, Radix Journal, which describes itself as "a periodical on culture, race, metapolitics, critical theory, and society".

[20] Spencer was the headline speaker at a 2016 NPI conference held in Washington, D.C., and celebrated the election of Donald Trump as "the first step towards identity politics in the United States"[21] and "the victory of will" (a reference to Triumph of the Will, the Nazi propaganda film).

[29] In 2021, a federal judge ordered the NPI to pay $2.4 million to a man injured at the 2017 "Unite the Right" rally in Charlottesville, Virginia.

[31] NPI's tax-exempt status was revoked in 2017 by the Internal Revenue Service (IRS) for failing to file tax returns.

The NPI has been described by the Southern Poverty Law Center (SPLC) as a white supremacist organization.

[34] Marilyn Mayo, the co-director of the Anti-Defamation League's Center on Extremism, said that the group "basically was founded to be kind of a white supremacist think tank".

"[35] Other groups that advance similar strategies include the New Century Foundation (and its publication American Renaissance,[7][35]) the Charles Martel Society (and its website the Occidental Observer),[7][11][35] and the Pioneer Fund, all of which have been described by the SPLC as playing leading roles in the promotion of "academic racism".