The most congested parts of the country have seen their populations go through the roof in the last 15 years, government figures have disclosed.
London, which is easily the most densely-populated area of the country, has nearly 5,000 people packed into every square kilometre.
The Office for National Statistics reported the numbers squeezed into the most crowded parts of Britain have soared by 10% since 1997.
However, that figure does not include the vast amounts of immigrants living here without declaring themselves to the relevant authorities.
The rising numbers who opt to live in England’s more wealthy southern regions made the country the most overpopulated in Europe two years ago.
The recent figures reveal there are an average of more than 400 people wedged into every square kilometre of England.
The population surge has been blamed on the last Labour government’s principle of encouraging mass immigration.
London’s population has soared by 11.6 per cent since 1997; in the East of England by 10.5 per cent, and by approximately 9 per cent across the rest of the South of the country.
Reports say present rates of population growth will lead to massive pressures on transport, housing, water and energy supplies.
Incredibly, the population of London has risen from 4,462 people in every square kilometre only 15 years ago to 4,978 in 2010.
The most over populated part of the capital is Kensington and Chelsea, which has 13,973 per square kilometre – an uncomfortable increase of 16.2 per cent.
Compare that to Berwick-on-Tweed and Tynedale, both in the North East have only 27 people on average to each square kilometre.
Sir Andrew Green, of the Migration-Watch think tank, said: ‘This is crystal-clear evidence of the impact of mass immigration on the population of a rather small island.
‘Immigration now accounts for two-thirds of our projected population increase and we are already the most crowded country in Europe.
‘The pressure of population means we shall have to build 200 homes a day for the next 20 years to accommodate new immigrants. The evidence is mounting that the country cannot cope with mass immigration on this scale and it is high time the political system responded by taking effective measures.’