From the blog of the Illinois State Genealogical Society:
The Illinois Death Certificates searchable database at ilsos.gov has been updated to include death certificate entries for the years 1951-1971!
CLICK HERE to visit the NEW 1951- 1971 Death Index Database!
This is a long-awaited update that is sure to help many Illinois family historians! The updated database is listed separately from the earlier death indexes, so now when you visit the State Archives Databases page at ilsos.gov, you will see the marriage index plus three death index options:
The information you will find in the new database is very similar to the 1916-1950 database-
Age at death
Date of death
City and county where the certificate was filed
Date certificate was filed
This information can be used to contact the county clerk for a copy of the death certificate. Death certificates prior to 1916 or after 1947 can be obtained through the county clerk’s office where the certificate was filed.