Governor Lincoln Chafee signed the bill.
The first weddings will take place Aug. 1, when the law takes effect.
“I’ve been waiting 32 years for this day, and I never thought it would come in my lifetime,” said Raymond Beausejour, a 66-year-old gay North Providence man who has been with his partner for 32 years. “For the first time in my life, I feel welcome in my own state.”
After Chafee signed the bill, the hundreds of people who gathered on the Statehouse grounds erupted into cheers as a chorus sang “Chapel of Love.”
“Now, at long last, you are free to marry the person that you love,” Chafee told the crowd.