As of January 01st 2018, Betty White, who played Rose, is the last surviving main cast member of The Golden Girls.
Estelle Getty, who played Sophia, died in 2008.
Bea Arthur, who played Dorothy, died in 2009.
Rue McClanahan, who played Blanche, died in 2010.
Harold Gould, who played Miles, died in 2010.
Herb Edleman, who played Stan, died in 1996.
It's a group, so, yes, many members are still alive.
Of the 4 original members, all of them are still alive. Only Sid Vicious is dead, he died of a heroin overdose.
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He's still alive but with many broken bones after being thrown (with jutsu) by Pein.