Human beings are an amazing species. Given enough time, they
will multiply, relocate and establish even on the most remote
corners of the world. The following islands, I’m sure, were once
uninhabited full of lush green forest, beautiful beaches and
perhaps an animal or two. Today, entire cities stands on them. But
unlike communities on mainland, land and resources on an island are
scarce. With no space to grow geographically these islands are
crushingly dense with people and housing.
Here is a collection of some of the most populous island in the
world.
Santa Cruz del Islote is unofficially the world’s most crowded
island. It can be reached by an hour’s boatride from Colombia’s
Caribbean coast. It has some 90 houses and a population of around
700 people, which can rise to 1200 when the children who attend
secondary school on the mainland visit their families.
Santa Cruz is surrounded by idyllic waters, but there is no
beach, no swimming pools or hotels. The islanders bury their dead
in a nearby island because there is no space for a cemetery. They
play football on the neighboring Mucura key, because the only
public square on Santa Cruz is about half the size of a tennis
court.
There is currently no electricity on Santa Cruz. The Colombian
navy ships brings drinking water to the island, once every three
weeks, but that’s not enough for the impoverished population. Women
wash the clothes with salty water from a nearby well. And men
settle for doing most of their necessities on the surrounding
sea.

The Hong Kong Island has a population of 1.2 million at a
density of 16,390/km², as of 2008. The population is heavily
concentrated along the northern shore where the density is 26,000
per km².
The island had a population of 3,000 inhabitants scattered in a
dozen fishing villages when it was occupied by the United Kingdom
in the First Opium War in 1842. The island is home to many of the
most famous sights in Hong Kong, such as “The Peak”, Ocean Park,
many historical sites and various large shopping centers. The
mountain ranges across the island are also famous for hiking.

Manhattan, an island at the mouth of the Hudson River, is the
most densely populated and the oldest of the five boroughs of New
York City. With a population of 1.58 million there are 26,924
residents per km², more dense than any individual American city.
Manhattan is the third-largest of New York’s five boroughs in
population, but the smallest borough in land area.
Manhattan is the major commercial, financial, and cultural
center of the United States. Anchored by Wall Street in Lower
Manhattan, New York City functions as the financial capital of the
world, with an estimated GDP of over 1.2 trillion and is home of
both the New York Stock Exchange and NASDAQ. Many major radio,
television, and telecommunications companies in the United States
are based here, as well as many news, magazine, book, and other
media publishers. It is also the location of the United Nations
Headquarters.

Salsette Island is located in the Arabian Sea on India’s west
coast. The metropolis of Mumbai, the city of Thane and
Mira-Bhayandar lie on this island, making it a very populous island
and one of the most densely populated island in the world. It has
about 15.1 million inhabitants living on an area of about 619 km²
amounting to a population density of 24,414 /km2.
The island has been inhabited since the Stone Age. The Kolis, a
fishing community, were the earliest known settlers of the islands.
The Maurya Empire gained control of the islands during the 3rd
century BCE, and transformed it into a centre of Hindu and Buddhist
culture and religion. The island came under the control of several
successive indigenous dynasties before landing in the hands of the
British in the 18th century. By that time the island, particularly
the city of Mumbai (formerly Bombay), had become an important
trading center.
Railway viaducts and road bridges were built in the 19th century
to connect Bombay Island to Salsette Island, and Salsette Island to
the mainland. These railway lines encouraged wealthier merchants to
build villas on Salsette Island, and by 1901 the population of this
Island was 146,993, and became known as Greater Bombay.

Venice in northeast Italy is situated on a group of 118 small
islands separated by canals and linked by bridges. It is located in
the marshy Venetian Lagoon which stretches along the shoreline
between the mouths of the Po and the Piave Rivers. Venice is
renowned for the beauty of its setting, its architecture and its
artworks. It was a major power during the Middle Ages and
Renaissance, and a staging area for the Crusades and the Battle of
Lepanto, as well as a very important center of commerce and art in
the 13th century up to the end of the 17th century.
In 2009, there were 270,098 people residing in Venice.
