Ancestry.com has announced that every name (106 million) in the 1920 U.S. Census is now fully indexed and available online at the company's subscription-based web site. The new index reportedly is Ancestry.com’s largest release ever.
The database lists details about those persons (heads of household) enumerated in the 1920 United States Federal Census, the Fourteenth Census of the United States. In addition, the names of those heads of households listed on the population schedule are linked to the actual images of the 1920 Federal Census, copied from the National Archives and Records Administration microfilm, T625, 2,076 rolls. (If you do not initially find the name on the page that you are linked to, try a few pages forward or backward, as sometimes different pages had the same page number.)
The previous index of the 1920 U.S. census listed only heads of household. That index was prepared some years ago by another company (before Ancestry.com even existed) and was known to have a high error rate. The new index introduced today maintains the old head of household index and adds to it a new every name index (including a re-keying of the heads of households). As a result, for many heads of households you will see two names - a primary, and an alternate. The primary name is the newly keyed name. The alternate name is the name as it appeared in the original head of household only index. Alternate names are only displayed when there is a difference in the way the name was keyed between the two indexes.
The 1920 indexes have been completed for all fifty US states plus the District of Columbia, American Samoa, Guam, Military and Naval Forces, Panama Canal Zone and the Virgin Islands. However, the index does not include Puerto Rico.
More details can be found at http://www.ancestry.com