The dpa news agency reported Monday two of the neo-Nazis were beaten so badly they needed hospital treatment.
The six neo-Nazis, aged between 27 and 35, were attacked by about 15 people on their way back to their cars after a rally of about 500 far-right extremists Saturday.
The demonstration was being held in advance of the anniversary of the Allied firebombing of Dresden on Feb. 13-14, 1945. Some 25,000 people died in the bombing, according to a 2008 official study. German neo-Nazis maintain the death toll was far higher.
Official commemorations promoting peace and reconciliation are scheduled Tuesday.