Mombasa is a coastal city of Kenya along the Indian Ocean. It is the country’s oldest (circa 900 AD) and second-largest city (after the capital Nairobi), with an estimated population of about 1.5 million people in 2017. Its metropolitan region is the second-largest in the country and has a population of approximately 3 million people. Administratively, Mombasa is the county seat of Mombasa County.