The US population is at 320.09 million people as of January 1. It is an increase of 11.35 million since the last census. During January 2015, the US is expected to have one birth every eight seconds and one death every 12 seconds. Net migration is expected to add one person to the US population every 33 seconds, according to the Census Bureau.
The combination of births, deaths, and net migration will add at
least one person to the US population every 16 seconds.