Objective: To explore the sexual and reproductive health behaviors of students from 13 community college campuses in California. Participants: Heterosexual college students, ages 18 to 24, who have had sexual intercourse (N = 4,487). Methods: The American College Health Association's National College Health Assessment (ACHA-NCHA) survey was administered in class to randomly selected classrooms at 12 institutions and electronically to randomly selected e-mails of students at 1 institution from March through April 2007. Results: This sample of community college students reported higher rates of risky sexual behaviors, unintended pregnancy, emergency contraception, and sexually transmitted diseases, and lower rates of human immunodeficiency virus (HIV) testing, than the overall ACHA-NCHA reference group. Those who had been tested for HIV reported more sexual partners, and lower rates of condom use. Conclusions: The data provide justification for broader educational programs and access to family planning services, condoms, and HIV testing on community college campuses. (Contains 3 tables.)