- Apiay city refers to Apia, the capital city of Samoa. Apia is located on the northern coast of the island of Upolu and is the largest city in Samoa. It serves as the commercial, political, and cultural center of the country. The city has a population of approximately 37,000 people and offers a mix of traditional Samoan culture and modern amenities. Tourist attractions in Apia include the Robert Louis Stevenson Museum, the Palolo Deep Marine Reserve, and the colorful Maketi Fou Market.