The following collections contain digitized sheet music. mostly from the late 19th and early 20th century. If you know of other digital collections, please let me know in the comment section below and I’ll add it. And if there’s a broken link, let me know.
This list represents a fraction of the sheet music collections housed in libraries around the country. In addition to those listed here, there are collections with electronic catalogs but no digitized images, collections with only a physical card catalog (yes, the old-fashioned physical drawers filled with cards!), and collections with no cataloging at all.
Many of these collections expose their metadata to the Sheet Music Consortium, meaning you can search across the participating collections rather than visiting each one individually.