Facebook has removed the official page of Britain First, along with those of party leader Paul Golding and deputy leader Jayda Fransen.
The social network said it had taken action after they repeatedly broke the site’s community standards on hate speech.
Mr Golding and Ms Fransen were jailed earlier this month after being convicted of religiously-aggravated harassment in Kent last year.
Facebook said they had continued to violate its rules despite issuing written final warnings over their conduct.
‘Content posted on the Britain First Facebook page and the pages of party leaders Paul Golding and Jayda Fransen has repeatedly broken our Community Standards,’ Facebook said.
‘We recently gave the administrators of the pages a written final warning, and they have continued to post content that violates our Community Standards.
‘As a result, in accordance with our policies, we have now removed the official Britain First Facebook page and the pages of the two leaders with immediate effect.
‘We do not do this lightly, but they have repeatedly posted content designed to incite animosity and hatred against minority groups, which disqualifies the Pages from our service.’