In california can i be grounded if im 18
You are an adult so legally no. But if you live and are supported by the people who grounded you then yes. If you don't like the rules you could always move out.
no your a legal adult...
I guess... It's basically how your family runs things
If you still live in your parent(s) home; their house, their rules. You're 18 and don't like the rules, move out!!
Yes. If you still live at home you are still a dependent of your parents unless something extreme has made them legally unfit parents
Their house, their rules!