Ben Raymond, 32, was found guilty of remaining a member of the organization after it was banned by the government in 2016.
He was also found guilty of two counts of possession of terrorist material following a trial at Bristol Crown Court.
Raymond, who has a partner and young daughter, waved from the dock as he was dropped off on Friday.
Judge Christopher Parker QC said he was a “principle proponent” for National Action, both before and after the ban.
The judge said Raymond sat “at the center of the site” as the group split into regional factions under new names, in an attempt to evade the ban.
“In the shadow of the internet, you continue to provide guidance to National Action organizations in the region on tactics, security, organization but most importantly propaganda,” he told the defendant.
“From the heart of that site, you intend, like other associates, that National Action will survive the ban.”
https://www.independent.co.uk/news/uk/crime/national-action-ben-raymond-sentence-b1969233.html Ben Raymond: Co-founder of neo-Nazi terrorist group National Action jailed for 10 years