A group pushing for same-sex marriage converged on Columbus on Saturday.
Demonstrators marched around Columbus Commons for marriage equality, and collected signatures for a Freedom to Marry amendment.
Members of the group FreedomOhio said the state's constitution needs to change, and going to other states to marry is not the answer.
"Ohio is my state. I'm going to stay here and fight for Ohio. And hopefully here soon, we can overturn DOMA and have marriage equality federally," said Morgan Bonney, FreedomOhio.
DOMA is the 1996 Defense of Marriage Act.
The U.S. Supreme Court will hear arguments Tuesday about whether it's constitutional.
Justices will also decide if a California law allowing same-sex marriage should be reinstated.