The capital of Minorca is Mahon, which is a five-letter word. Mahon is a port city located on the Spanish island of Minorca in the Mediterranean Sea. It is the second largest city in the Balearic Islands and has a population of around 40, 000 people. The city is known for its historical architecture, including the 17th century Fortaleza de San Felipe, which was built by the Spanish to protect the city from attack.