I love the tiny thrill of planning for sky events, and when it comes to eclipse glasses, public libraries are often my first stop. Over the years many city and county library systems have partnered with science centers and local government to hand out certified viewers around eclipse dates, so the best move is to treat your local library like a seasonal resource hub. Big municipal systems (think large city public libraries), county branches, and even several university and college libraries have historically done distributions or hosted viewing events with free viewers.
If you want specifics, start by checking your library’s website and social accounts because they usually post distribution details: how many glasses they have, whether you need to reserve, and what times/locations are participating. Also look at your state library association or your county’s parks and rec/health department pages — they sometimes coordinate mass distributions and list participating libraries. A lot of libraries partner with astronomy clubs, museums, and planetariums for these events, which can mean in-person viewing programs where they hand out solar viewers.
A practical safety tip I always repeat: only use glasses that meet the 'ISO 12312-2' solar safety standard and avoid any homemade filters or scratched lenses. Libraries will usually advertise that the viewers are certified; if they don’t state certification, ask. Quantities tend to be limited and policies vary — some libraries require one per person, others put caps on family packs — so plan ahead, call the branch, or arrive early if you really want to secure a pair.