(also Yenbo), a city and port in Saudi Arabia, on the Red Sea. Population, approximately 10,000. Yanbu is connected by highway with Medina, Jidda, and Mecca. It has a commercial fishing industry. Black coral and amber are gathered in the vicinity. In 1978 an oil refinery with a capacity of 12.5 million tons per year was under construction. Petroleum will be delivered to the refinery by a pipeline.