The eHealth Literacy Scale (eHEALS) is a 8-item self-report tool designed to assess consumers' perceived skills in using information technology for health. The scale measures consumers' combined knowledge, comfort, and skills in finding, evaluating, and applying electronic health information to health problems. The study aimed to psychometrically evaluate the properties of the eHEALS within a population context, focusing on a youth population due to their high levels of eHealth use and familiarity with information technology tools. Data were collected from 664 participants aged 13 to 21 at baseline, post-intervention, and 3- and 6-month follow-ups. The eHEALS demonstrated high internal consistency (α = .88) and modest test-retest reliability (r = .68 to .40). Principal components factor analysis produced a single factor solution explaining 56% of the variance. The eHEALS reliably captures eHealth literacy and has potential as a tool for assessing consumer comfort and skill in using information technology for health. Further research is needed to examine the eHEALS' applicability to other populations and settings, and to explore the relationship between eHealth literacy and health outcomes.The eHealth Literacy Scale (eHEALS) is a 8-item self-report tool designed to assess consumers' perceived skills in using information technology for health. The scale measures consumers' combined knowledge, comfort, and skills in finding, evaluating, and applying electronic health information to health problems. The study aimed to psychometrically evaluate the properties of the eHEALS within a population context, focusing on a youth population due to their high levels of eHealth use and familiarity with information technology tools. Data were collected from 664 participants aged 13 to 21 at baseline, post-intervention, and 3- and 6-month follow-ups. The eHEALS demonstrated high internal consistency (α = .88) and modest test-retest reliability (r = .68 to .40). Principal components factor analysis produced a single factor solution explaining 56% of the variance. The eHEALS reliably captures eHealth literacy and has potential as a tool for assessing consumer comfort and skill in using information technology for health. Further research is needed to examine the eHEALS' applicability to other populations and settings, and to explore the relationship between eHealth literacy and health outcomes.