Do I need to have a reason to get a divorce in California?

No. California was the first “no-fault” state in the country. This means that any person can file to end a marriage or domestic partnership without having to explain why (other than simply stating “irreconcilable differences”). Nor is there a need to prove fault or “bad behavior” by the other party. For example, a party cannot in most cases obtain a legal benefit if the other party has committed adultery.