U.S. POPULATION 2012 | America
U.S. Current population is is 312,706,738

Which country has the third highest in the world according to population?
United States

Here we will calculate the U.S. Population according to the current growth rate.

"For 1 January 2012
It is 29 days, 6 hours, 12 minutes, 19 seconds
until Sunday, 1 January 2012 (UTC time)
Current time is
Friday, 2 December 2011, 17:47:41 UTC"

So time left for 1 January 2012 is 2527970 Seconds
UNITED STATE of AMERICA Current Population at the Movement (2 December 2011, 17:47:38 UTC) is 312,706,738

COMPONENT SETTINGS FOR DECEMBER 2011(source census.gov)

One birth every.................................. 8 seconds
One death every.................................. 11 seconds
One international migrant (net) every............ 45 seconds
Net gain of one person every..................... 15 seconds

So according to the above net gain of every person

So the Total Population of U.S would be on 1 January 2012 = Current U.S Population + Time left for 1 January 2012 / per person gain time
312,706,738 + 2527970/15 = 312875269 (gain 168531)
UNITED STATE of AMERICA 2012 POPULATION :- 312875269 (1 JANUARY 2012)

For World Population 2012 Click here

USA POPULATION 2012 | America
U.S. Current population is is 312,706,738

Which country has the third highest in the world according to population?
United States

Here we will calculate the U.S. Population according to the current growth rate.

"For 1 January 2012
It is 29 days, 6 hours, 12 minutes, 19 seconds
until Sunday, 1 January 2012 (UTC time)
Current time is
Friday, 2 December 2011, 17:47:41 UTC"

So time left for 1 January 2012 is 2527970 Seconds
UNITED STATE of AMERICA Current Population at the Movement (2 December 2011, 17:47:38 UTC) is 312,706,738

COMPONENT SETTINGS FOR DECEMBER 2011(source census.gov)

One birth every.................................. 8 seconds
One death every.................................. 11 seconds
One international migrant (net) every............ 45 seconds
Net gain of one person every..................... 15 seconds

So according to the above net gain of every person

So the Total Population of U.S would be on 1 January 2012 = Current U.S Population + Time left for 1 January 2012 / per person gain time
312,706,738 + 2527970/15 = 312875269 (gain 168531)
UNITED STATE of AMERICA 2012 POPULATION :- 312875269 (1 JANUARY 2012)

For World Population 2012 Click here

WORLD POPULATION 2012
World population growth rate is very high, Current World Population is 6,978,709,076 (16:49 UTC (EST+5) Dec 02, 2011).
Population in the world is currently growing at a rate of around 1.10% per year. The average population change is currently estimated at around 75 million per year.
Annual growth rate reached its peak in the late 1960s, when it was at 2% and above. The rate of increase has therefore almost halved since its peak of 2.19 percent, which was reached in 1963, to the current 1.15%.
According to the U.S. Census Bureau, the total population of the World will be reach on or Cross the 6,984,895,594 on 1st January 2012.
and it will touch the 7 billion on End of March 2012 or and cross the 7 billion population on 1st April 2012.
According to The current Monthly World population 2012 (U.S Census Bureau).
The world population will touch the 7,023,324,899 on 1st July 2012.
There is the WORLD POPULATION 2012 MONTH WISE (SOURCE U.S Census Bureau)

2012 Monthly World population figures:

DATE	WORLD POPULATION 2012
1st July 2011	6,946,043,989
1st August 2011	6,952,589,639
1st September 2011	6,959,135,290
1st October 2011	6,965,469,791
1st November 2011	6,972,015,442
1st December 2011	6,978,349,943
1st January 2012	6,984,895,594
1st February 2012	6,991,441,244
1st March 2012	6,997,564,595
1st April 2012	7,004,110,246
1st May 2012	7,010,444,747
1st June 2012	7,016,990,398
1st July 2012	7,023,324,899

2012 POPULATION BY COUNTRY

COUNTRY	POPULATION	DATE
U.S. (click here for more)	312,875,269	1st JANUARY 2012
other countries p. available soon..

Source:- www.census.gov