Secondly, the age of consent in California is also eighteen. This means that individuals in California are considered adults at the age of eighteen. First and foremost, the age of majority in the state is eighteen. There are a few reasons why the legal age to date is eighteen in California. There are no exceptions to this rule, regardless of the age difference between the two parties involved. This applies to both heterosexual and homosexual relationships. In the state of California, the legal age to date is eighteen.