Kerry met with the king and other royalty Sunday at a palace in Riyadh, the Saudi capital.
According to the Associated Press, the two discussed regional issues. Ahead of the trip, the US State Department said Kerry would discuss the war in Yemen and stalled peace efforts to end the conflict.
Yemen's war began when Saudi-led coalition attacked Houthis and their allies who has seized Yemen's capital, Sana’a, in September 2014.
A Saudi-led coalition of mostly Persian Gulf Arab nations launched a campaign in March 2015 against houthis. Their offensive has included punishing airstrikes that have caused civilian casualties.