A recent thread on the Web4Lib listserv explored various Web tools for locating libraries geographically. Here’s a review of those plus a few more.
(Click thumbnails for larger images)
Public Library Geographic Database (PLGDB) Mapping
WebJunction: Online Directory of Public Library Statistics*
“Here’s a directory of public library statistics available online, organized by state.”
Canadian Library Gateway
Find Canadian libraries
(Find medical libraries in the U.S. and Canada)
Let me know which resources I’ve missed and I’ll add ’em.