The following is an excerpt from the government census webpage located at . The required .pdf form is also downloadable from that site.
Best wishes, Lisa
AGE SEARCH SERVICE
The Census Bureau provides an "age search" service to the public:
We will search the confidential records from the Federal population censuses of 1910 to 1990 and issue an official transcript of the results (for a congressionally mandated fee).
NOTE: Information can be released only to the named person, his/her heirs, or legal representatives.
Individuals can use these transcripts, which may contain information on a person's age, sex, race, State or country of birth, and relationship to the householder, as evidence to qualify for social security and other retirement benefits, in making passport applications, to prove relationship in settling estates, in genealogy research, etc., or to satisfy other situations where a birth or other certificate may be needed but is not available.
Age Search Fact Sheet
FEE REQUIRED: $40 for a search of one census for one person only.
YEARS SEARCHED: 1910 through 1990.
ACCESS: Census records with individual names are not on computer. They are on microfilm, arranged according to the addressat the time of the census. Most agencies require the earliest census after the date of birth.
REQUIRED: A completed BC-600 Application (PDF) for Search of Census Records, signed by the person for whom the search is to be conducted.This person may authorize the results to be sent to another person/agency by also completing item 3 of the application.