Dawn Wells (Mary Ann) RIP. Tina Louise (Ginger) is still kickin, and single. I believe Tina is the only surviving cast member from the original castaways.
https://variety.com/2020/tv/news/dawn-wells-dead-gilligans-island-mary-ann-1234876755/
https://variety.com/2020/tv/news/dawn-wells-dead-gilligans-island-mary-ann-1234876755/