Saudi Arabia joined the UN in 1945 and is a founding member of the Arab League, Gulf Cooperation Council, Muslim World League, and the Organization of the Islamic Conference (now the Organisation of Islamic Cooperation).
Saudi-Arabien var et af de grundlæggende medlemmer af FN i 1945, den Arabiske Liga, Golfstaternes samarbejdsråd og Organization of the Islamic Conference (nu Organisation of Islamic Cooperation).