Karachi is the largest city in Pakistan and the capital of Sindh province. It is the main seaport and financial center of Pakistan. Karachi is also known as city of lightsmainly due to city's night life, for which it is famous as the city which never sleeps. Karachi metro has an estimated population of over 23.5 million people as of 2013, and area of approximately 3,527 km (1,362 sq mi) resulting in a density of more than 6,000 people per square kilo meter (15,500 per square mile).

Karachi is the 7th largest urban agglomeration in the world and thesecond largest in the Muslim world. It is also world 7th least expensive city to live based on cost of living. It is Pakistan's centre of banking, industry economic activity and trade and is home to Pakistan's largest corporations, Including those involved in tectiles, shipping automotive industry entertainment the arts fashion advertising publishing software development and medical research. The city is a hub of higher education in south Asia and the Muslim World.

Karachi is also ranked as a beta world city. It was the capital of Pakistan until Islambad was constructed as a capital to spread development evenly across the country and the prevent it from being concentrated in Karachi. Karachi is the location of the port of Karachi and port bin Qasim, two of the region largest and busiest ports. after the independence of Pakistan, The city population increased dramatically when hundreds of thousands of Muslim Muhajirs from India and from other parts of South Asia came to settle in Karachi