Population Growth The US population has grown from 2.5 million in 1776 to 76.3 million in 1900 to 158.8 million in 1950 to 329.5 million in 2020. More than a 100-fold increase, 2+ orders of magnitude. 28 individual metro areas today EACH have a population (2020) equal to or greater than the WHOLE USA in … Continue reading Really Big Changes in the USA: 1776 – 2026