A sample of 238 15- to 16-year-old secondary school students from Northern Ireland answered a questionnaire in their schools about the level of anxiety and some aspects of their health behavior. Analysis of the findings showed that these teenagers had no higher anxiety than a Northern American sample of teenagers. In addition, anxiety was clearly correlated with a variety of health complaints and with use of the health service. The findings are discussed with reference to previous research on adolescent health and on stress in Northern Ireland.