I was brought into the US with a visa when I was 6 years old, but my visa expired. I'm underage, still in high school and have been living here for almost 10 years. I was wondering if it'd be possible for me to become a legal US citizen once I'm old enough. Or if I won't be able to since I'm living here with an expired visa.

What is your parents current status ? They should start with a immigration attorney and start the process of bringing your documents current.

My parents also came here with a visa but I think its expired now too.