Karachi is the largest city, main seaport and the main financial centre

Financial Centre

A financial centre is a global city that is a company and business hub, as well as being home to many world famous banks and/or stock exchanges....

 of Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

, as well as the capital of the province of Sindh

Sindh

Sindh historically referred to as Ba'ab-ul-Islam , is one of the four provinces of Pakistan and historically is home to the Sindhi people. It is also locally known as the "Mehran". Though Muslims form the largest religious group in Sindh, a good number of Christians, Zoroastrians and Hindus can...

. The city has an estimated population of 13 to 15 million, while the total metropolitan area has a population of over 18 million. Karachi is the most populous city in the country, one of the world's largest cities in terms of population and also the 10th largest urban agglomeration in the world.