The American College Health Association - National College Health Assessment III (ACHA-NCHA III) is a nationally recognized research survey created by the American College Health Association to collect comprehensive data on college students' health behaviors and perceptions. The dataset contains information across multiple domains including mental health (stress, anxiety, depression), physical health and wellness, substance use, sexual health, personal safety, healthcare utilization, and academic impacts. Its primary purpose is to help higher education institutions understand their students' health needs and inform program planning, resource allocation, and service delivery to better support student success. The survey is administered confidentially via web-based platforms every other year to random samples of students, providing both institutional-specific data and national reference group benchmarks. Key features include its large sample sizes (typically tens of thousands of respondents), use of display logic to optimize question relevance based on prior responses, and detailed demographic breakdowns including gender identity categories. The data serves as a critical tool for addressing health disparities, tracking longitudinal trends, and implementing evidence-based interventions that positively impact both student well-being and academic outcomes.