The capital city of which country is located on the island of Upolu?

Upolu is an island in Samoa, formed by a massive basaltic shield volcano which rises from the seafloor of the western Pacific Ocean. The island is 75 kilometres (47 miles) long and 1,125 square kilometres (434 square miles) in area, making it the second largest of the Samoan Islands geographically. With approximately 145,000 people, it is by far the most populated of the Samoan Islands. Upolu is situated to the southeast of Savai'i, the "big island". Apia, the capital, is in the middle of the north coast, with Faleolo International Airport at the western end of the island. The island has not had any historically recorded eruptions, although three lava flows date back only a few hundred to a few thousand years.

Apia was originally a small village (the 1800 population was 304, from which the country's capital took its name. Apia village still exists within the larger modern capital of Apia which has grown into a sprawling urban area with many villages. Like every other settlement in the country,

The modern capital Apia was founded in the 1850s and has been the official capital of Samoa since 1959. From 1900 to 1919, it was the capital of German Samoa. Apia is the only city in Samoa and falls within the political district of Tuamasaga.

The Apia Urban Area has a population of 36,735 (2011 census) and is generally referred to as the City of Apia.