As of March 2021, according to website, Adults $19.99 Seniors 65+ $17.99 Military with ID $17.99 Students with ID $12.99 Teens 15-19 $12.99 Children 14 & under free Seattle Art Museum Members free
They didn't give a discount when I asked and showed them a military ID. In my opinion this art museum was a waste of money.
Also look for free admission (first thursdays but check their website before going).
Last time i was there the price was a request but not mandatory.
Thanks! Your answer is awaiting moderation.