If you’re researching your Cook County, Illinois, ancestors and you aren’t a volunteer indexer for FamilySearch, you may want to consider joining up. There are several Illinois projects currently underway and you can help make these records available sooner by donating some of your time. Indexing is easy - check out the details on the FamilySearch indexing site.
US, Illinois, Chicago—Catholic Church Records, 1833–1910 [Part A] Current status: 43% indexed, 43% arbitrated.
US, Illinois, Cook County—Births, 1923–1938 [Part 1B] Current status: 49% indexed, 22% arbitrated.
One collection, US, Illinois, Cook County—Deaths, 1959–1994 [Part B], is no longer on the active project list, so watch for it to go live soon.