Because both scholars and policymakers draw from military personnel survey results, survey participants need to be representative of the population. This research examined response rates for several major online U.S. Department of Defense military personnel surveys and found that younger service members, particularly younger enlisted personnel, tend to have very low response rates, even when surveys that are only 50 percent complete are defined as completed. The authors identify possible explanations, including military- and nonmilitary-specific situational and technological barriers and motivational factors.