Some estimate a 2020 population of 40,000,000.
About 309 million.
A census is done on the population. This is important because the representatives in the house is based on the population of each state.
The US Census is taken every ten years in the years ending with zero so the population for all other years is an estimate only. The estimated US population for 2008 is about 306, 750,000. The 2000 census reported 281,421,906 residents.
In the US the population is counted on every year that ends with a zero, or every ten years, through the conduction of a census.
The US officially counts its population every 10 years through the decennial census conducted by the Census Bureau.
The population in the US is projected to be around 350 million in 2025 based on current growth trends and demographic projections. However, these estimates may vary depending on factors such as birth rates, immigration rates, and government policies.
The closest you will ever get to an absolute population is via the US Census which is only taken every ten years. Everything else is a good faith estimate of the population.
According to the New York Times Almanac, the population of the United States in 1860 was 31,443,321. The population of the nation ten years later, 1870 (the census is taken every ten years), was 38,558371.
Every 10 Years =]
Detroit, Michigan had the lowest White population among the ten largest cities in the US.
We have grown more numerous, less wealthy, and the workforce has grown more female/less male.
The "exact population" is reported once each ten years based on the US Census. From that reporting until the next Census, all reports are statistical estimates.