Port Louis Port Louis – the largest and most prosperous capital city of Mauritius. The city lies in the northwestern part of the island. A total of about 160,000 residents live there. During the day, the city bustles with life and activities, you will encounter traffic jams and quite a few vehicles and traffic lights, when you have to pay careful attention and drive carefully there. In the evening you will feel how much quieter and calmer the place becomes. The city is located around a port which is one of the most central and important places for the country’s economy and most of the international trade passes through it.