The ultras took part in protests during and after the 2011 uprising, and frequently clash with police in and around stadiums. The ruling by the Court of Urgent Matters in Cairo appeared to be the latest effort by the judiciary to prevent demonstrations.
During the 2011 uprising that forced out President Hosni Mubarak, ultras often provided muscle, directed demonstrators and led chants. They are considered one of the most organised movements in Egypt after the Muslim Brotherhood, which the government outlawed as a terrorist organisation following the 2013 military overthrow of Islamist President Mohammed Morsi.
He called the ruling a "dangerous gamble" for the government.
The case was filed by Mortada Mansour, the head of the Zamalek Football Club, one of Egypt's most popular teams. Mansour has long been at odds with his team's ultras organisation, known as the White Knights.
Since the 2012 stadium violence, authorities have sharply limited attendance at matches.
"Egyptian soccer clubs are hurting," Dorsey said. "They've either not been playing for the last four years, or a good part of the past four years, or they've been doing it in empty stadia."
Authorities said at least 19 people were killed in February when police fired tear gas into a crowd of fans waiting in a fenced, narrow corridor trying to enter a match. Many of the dead suffocated or were crushed.
