Commissioners say the ordinance is modeled after similar regulations already on the books.
It requires owners to restrain their dogs and to provide notice to the public. It also enforces strict penalties for not complying.
Commissioners say the ordinance is a way to protect the public.
"We've had people with small dogs attacked and killed, people bitten and hurt and outside of our cities that address those issues, we've had nothing to protect people- now we have a penalty phase, a confinement phase," said Randy Elliott, a Marion County Commissioner.
Commissioners say the ordinance does not target any one specific breed of dog. It goes into effect immediately.