[nereye]

> I forget if you need to be a Seattle resident to get a card

Any resident of King County* can get an SPL (Seattle Public Library) card, due to a reciprocal agreement between SPL and KCLS (King County Library System).

* with an exception for a couple of towns within KC which are not part of KCLS, from https://www.spl.org/using-the-library/get-started/get-starte...:

"If you live, work, go to school or own property in King County (even outside the city of Seattle) you qualify for a free Seattle Public Library card through our reciprocal agreement with the King County Library System. (The only exceptions are the towns of Hunts Point and Yarrow Point, which are not part of the King County Library System.)".

And indeed, as already mentioned in a sibling comment, most counties have reciprocal agreements with both SPL and other counties' library systems too.

[balls187]

This is a more recent happening. Some years ago, you did have to be a resident of Seattle to have an SPL card. However you could still use many library services without one.