Can I become a firefighter if get high school diploma but went to community college?

Yes, you can become a firefighter with a high school diploma even if you attended community college. A high school diploma or GED is generally the minimum educational requirement for most fire departments. While some departments may prefer or require additional education or certifications (like an associate's degree or EMT certification), they won't disqualify you simply for having attended community college *in addition* to your high school diploma. Your community college coursework might even be beneficial, depending on the courses you took.