Trans people wishing to change their gender identity on their birth certificates will no longer have to go through the court.
The Democratic-controlled Legislature passed this bill with some Republican support.
This legislation will come into effect next year. Oregon will become the second state after California to adopt such a law that reduces discrimination against trans people.
"It's a minor tweak to state law that could have a big impact on the local transgender community," executive co-director of Q Center Stacey Rice told KRGV.
The adoption of this law feels good, especially after all cases against the trans community of the United States.
Governor Brown, who became the first openly bisexual governor last November, said: "hate and discrimination had no place in our Oregon".