The United States has grown – by about 17 million people since 2010.
The U.S. population clock is based on a series of short-term projections for the resident population of the country, according to the Census Bureau.
This includes people whose usual residence is in the 50 states and the District of Columbia. These projections do not include members of the Armed Forces overseas, their dependents, or other U.S. citizens residing abroad.
The projections are based on a monthly series of population estimates starting with the April 1, 2010 resident population from the 2010 Census.
At the end of each year, a new series of population estimates, from the census date forward, is used to revise the postcensal estimates, including the population clock projections series. Once a series of monthly projections is completed, the daily population clock numbers are derived by interpolation.
Within each calendar month, the daily numerical population change is assumed to be constant, subject to negligible differences caused by rounding.
The following are the 50 most populous cities in the U.S. based on the 2017 population estimates by the Census Bureau. The 14 largest have not changed since 2016.