Decatur Public Library Local History Collection | IL
Impressive archive with 77 digital collections (and counting?). All local yearbooks up to 1977 are available. They promise to add new content WEEKLY!
Macon County
Digital Special Collections (University of Illinois)
Digitized manuscripts, photographs, maps, and other special collections research materials, as well as personal and organizational digital archives.
CARLI Digital Collections
Digitized materials from Illinois Libraries including printed and manuscript materials, images, and sound recordings.
Illinois History and Lincoln Collections
The Illinois History and Lincoln Collections (IHLC), a unit of the Special Collections Division at the University of Illinois Library at Urbana-Champaign, collects, preserves, and provides access to both print and manuscript materials documenting the history of Illinois and the life and legacy of Abraham Lincoln.