Sydsudan er lovet medlemskab af den [[Arabiske Liga]],<ref name="sdntribuneArabLg">{{cite news |url=http://www.sudantribune.com/South-Sudan-entitled-to-join-Arab,39193 |agency=Sudan Tribune |date=12. juni 2011 |access-date=8. juli 2011 |title=South Sudan "entitled to join Arab League" |archive-date=29. juni 2011 |archive-url=https://web.archive.org/web/20110629062631/https://www.sudantribune.com/South-Sudan-entitled-to-join-Arab,39193 |url-status=dead }}</ref> men landet har også mulighed for at vælge observatørstatus.<ref>{{cite news |url=http://weekly.ahram.org.eg/2011/1055/re10.htm |agency=Al-Ahram |date=7. juli 2011 |access-date=8. juli 2011 |title=Hoping for the best |first=Asmaa |last=El-Husseini}}</ref> Det blev indlagt på UNESCO den 3. november 2011.<ref>{{cite web|url=http://www.gossmission.org/goss/index.php?option=com_content&task=view&id=1263&Itemid=1|title=South Sudan is UNESCO's 194th member|publisher=Embassy of the Republic of South Sudan in Washington, DC|date=3. november 2011|access-date=1. december 2011|archive-url=https://web.archive.org/web/20111129094633/http://www.gossmission.org/goss/index.php?option=com_content&task=view&id=1263&Itemid=1|archive-date=29. november 2011|url-status=dead}}</ref> Den 25. november 2011, er landet officielt tiltrådt Mellemstatslige Organisation for Udvikling, en regional gruppering af [[østafrika]]nske stater.<ref>{{cite news |url=http://af.reuters.com/article/investingNews/idAFJOE7AO0A820111125 |agency=Reuters |date=25. november 2011 |access-date=25. november 2011 |title=East African bloc admits South Sudan as member |archive-date=10. maj 2012 |archive-url=https://web.archive.org/web/20120510050715/http://af.reuters.com/article/investingNews/idAFJOE7AO0A820111125 |url-status=dead }}</ref>
Historie Tidligere_riger,_stater,_protektorater,_kolonier_og_lande Foreninger Organisationer