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Source Information

Ancestry.com. Cook County, Illinois Birth Index, 1916-1935 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2008.
Original data: Cook County Clerk, comp. Cook County Clerk Genealogy Records. Cook County Clerk’s Office, Chicago, IL: Cook County Clerk, 2008.

About Cook County, Illinois Birth Index, 1916-1935

This database contains an index to over 1 million births from 1916-1935 for Cook County, Illinois.

Historical Background:

In Illinois, births were not generally recorded on a county level until 1877, and the practice was not universal until 1916. Prior to 1916 births were only recorded at the county recorder’s office. After 1 January 1916, it became mandatory to record births at both the county recorder’s office and the Illinois Department of Public Health.*

About This Database:

This index provides:

  • Name of child born

  • Birth date

  • File number

Once you have found a person of interest, you can order a copy of the person’s birth certificate directly from Cook County by following the link provided on the individual’s record page. This link will take you to the Cook County Clerk’s Genealogy website where you can purchase a copy of it.

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