It varies depending on the agency, the scope of the request and the purpose of the request. For just one example, here's the State of Illinois FOIA FAQ: https:

It varies depending on the agency, the scope of the request and the purpose of the request. For just one example, here's the State of Illinois FOIA FAQ: https://www2.illinois.gov/dnr/FOIA/Documents/FOIA_Frequently_Asked_Questions.pdf https://www2.illinois.gov/dnr/FOIA/Documents/FOIA_Frequently...