From the Hawaii State Department of Health website:

"The State Legislature approved Senate Bill 232 in February 2011 to recognize and establish the status of civil unions in Hawaii. Senate Bill 232 was signed into law by Governor Neil Abercrombie on February 23, 2011 and became Act 1. The Act makes same-sex and opposite-sex couples eligible for civil union recognition beginning January 1, 2012, and grants civil union couples many of the same rights as married couples in Hawaii."

Please follow this link for more information:

http://hawaii.gov/health/vital-records/vital-records/civilunion/index.html

If you have questions, please call the Department of Health, (808) 586 4533.