The 11 have links to al-Qaeda and Islamic State, The Times reported on Friday.
A proclamation in the Government Gazette this week noted that the group consisted of financiers, recruiters and logistical supporters of the terror groups.
The 11 men and women are from Norway, Saudi Arabia, Kuwait and Iraq, reported The Times.
Senior politics professor at the University of the Free State Hussein Solomon reportedly told the newspaper South Africa had been used by global terror networks since the 1990s.
“Al-Qaeda has had a presence here since 1997,” Solomon was quoted as saying.
“By 1995 there were five Hezbollah camps in South Africa. The list of the who’s who of the terrorism zoo in South Africa goes on and on.”