James Alex Fields Jr., 22, received the sentence for killing one person and injuring dozens during the "Unite the Right" rally in Charlottesville on Aug. 12, 2017.
Fields was sentenced last month to life in prison on 29 federal hate crime charges.
Judge Richard Moore followed a state jury's recommendation in handing down the sentence.
Under state law, he was allowed to go lower than the recommendation, but not higher.
Later that day, Fields plowed his car into a crowd of counterprotesters, killing Heather Heyer, 32, and injuring more than two dozen others.
Last month, Fields admitted to deliberately driving his car into counterprotesters who showed up to demonstrate against the white nationalists.
"I would like to see him change in time from a white supremacist to someone who helps bring others away from white supremacy. »