The United States Census Bureau provides a calculation of current residents through a population clock published on its website. The population clock includes an estimate of all individuals usually residing in the 50 states and the District of Columbia, regardless of citizenship status. However, these estimates do not include members of the armed forces overseas or citizens residing outside of the United States.
The Census Bureau first published its population clock with data from the 2010 census, and it updates this data annually. The Bureau also publishes population estimates by region, state, city, age, and sex. The Bureau's website displays this information in a series of interactive graphs.
More detailed information about the current population appears on the Bureau's interactive QuickFacts website. This website allows visitors to filter population data through categories such as primary language, level of education, veteran status and living arrangement. The QuickFacts website provides this information for all states, counties and cities with a population of at least 5,000 residents. The website also displays statistical changes in the population. Visitors may view data in chart or graph form, and they may download or print spreadsheets of the selected data. The official census is taken once every 10 years.