Source Information & Methodology

Source information and methodology for Other U.S. Territories (total of American Samoa, Guam, Northern Mariana Islands and U.S. Virgin Islands).

Names Data Information
  • Data is sourced from Social Security Administration .
  • Names data is currently available for the years 1998‑2018.
  • Data is available for names with a count of 5 or more each year only.
  • Names data comes from applications for Social Security cards, not birth registrations. Although today nearly everyone in the United States has a Social Security card, that was not the case in the early years of the Social Security program. Some people born before 1937 never obtained a Social Security card because their employment was not covered under Social Security or they died before it became covered. Even in more recent years, many of those who died before entering the covered work force never obtained a Social Security card.
  • Data is restricted to cases where the year of birth, sex, state/territory of birth are recorded, and where the given name is at least 2 characters long.
  • Names data has not been edited. For example, the sex associated with a name may be incorrect. Entries such as Unknown and Baby are not removed from the lists.
  • Names have been converted to ‘proper case’ format, so names with the same spelling but different capitalisation have been grouped. For example, the name McKenzie will have been grouped with Mckenzie. A few names will have a lower-case letter where there should be an upper-case letter. For example, a forename of AJ will appear as Aj.
  • The available names data has been used to produce the following statistics for each name:
    • Rank: The position of a name when the list of names for a given year has been placed in order from highest count to lowest count. Names with an equal count have been given the same rank, and placed in alphabetical order in popularity tables.
    • Change in rank: The difference in ranks of a name between a given year and a previous year.
    • Count: The number of boys or girls given a particular name in a given year.
    • Relative change in count: The relative difference in counts between a given year and a previous year. The relative change is not the actual difference between counts, but gives a better idea of the change from a previous year by taking into account the different total number of births for each year.
    • Percentage of total male/female births: The number of boys or girls given a particular name in a given year as a proportion of the total number of male or female births in that year.
    Relative change in count and percentage of total male/female births statistics are only available for years where number of data is available.
  • New names data is added to the site when it becomes available, usually around March each year.
Data Information
  • Number of female and male per year data is not available for Other U.S. Territories.