An official website of the United States government
Here’s how you know
Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( Lock A locked padlock ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Data on the age and sex composition of the population can be found from a variety of sources. These sources are listed in the Surveys/Programs area with brief descriptions to help you decide which data source would best suit your needs.