- Stephenson County Birth, Death, & Marriage Certificates (non-certified copies) on microfilm
- Births: 1878 – November 4, 1918
- Marriages: 1837 – December 29, 1940
- Deaths: 1878 – December 27, 1968
- Delayed birth certificates: primarily the 1940s, with some earlier births included
- Stephenson County (IL) Probate Index 1818-1950. It covers wills and guardianship records, also mental competency. It indicates the box number where the records can be found. These records may be viewed at the courthouse (Office of the Circuit Clerk) – 2nd Floor Stephenson Co. Courthouse (actual records housed on 3rd floor).
Federal census materials
- Federal Census Microfilm 1820 – 1930 for Stephenson County and some adjacent counties.