They became U.S. citizens during a ceremony Friday at the Margaret Chase Smith Federal Building.
A man from Jamaica said he sought asylum in the U.S. in 2012 because of his sexual orientation.
"It's a bittersweet feeling when you leave a place where you were born and grew up in and you had to run away from that place. It does leave a hole in your heart," said Wesley Wiggins-Mehlman.
The new citizens come from 14 different countries. A court clerk said citizenship ceremonies are typically held twice a year in Bangor.