The Purple Dog Little Free Library

Chicago's library category lists 392 entries, so browsing the whole thing at once isn't practical. A faster way in: pick a zip code you already know. The 60637 area alone holds 14 listings, more than double the 7 found in 60614 or 60617, so starting local narrows things fast without any special filter.

Once you're looking at a shorter list, check what's actually filled in. Only 185 listings have a phone number on file, and 255 include a website link, so a fair number of entries are missing one or both. None of these library listings show a Sponsored tag at the moment, and that label only appears once a business pays for placement here, so the order you're seeing is just plain directory data. If you manage one of these libraries and the phone field is blank or the website link is stale, you can claim the listing and fill in the gap yourself, which helps the next Chicago resident trying to reach you.