The Hawaii Senate on Tuesday passed a marriage equality bill by a 19-4 margin.
The House already passed the measure, which expands religious exemptions, and Gov. Neil Abercrombie (D) has indicated he will sign the bill. Gay couples can start obtaining their marriage licenses on Dec. 2.
Hawaii will become the 15th state to legalize gay marriage.
The Illinois legislature also passed gay marriage legislation last week, and Gov. Pat Quinn (D) is expected to sign the bill before the end of November.