from Wikipedia Jidda:
For the Bahraini island, see Jidda Island.
Jeddah (also spelled Jiddah, Jidda, or Jedda; Arabic: جدّة Ǧiddah) is a Saudi Arabian city located on the coast of the Red Sea and is the major urban center of western Saudi Arabia. It is the largest city in Makkah Province, and the second largest city in Saudi Arabia after the capital city, Riyadh. The population of the city currently stands at over 3.4 million. It is considered the commercial capital of Saudi Arabia and the wealthiest city in the Middle East and western Asia.
Jeddah is the principal gateway to Mecca, Islam's holiest city, which able-bodied Muslims are required to visit at least once in a lifetime.
Residents of Jeddah are called Jeddans. Jeddah has 24 sister cities, which are selected based on economic, cultural and political criteria.