AbstractAimThis study aimed to determine the electronic health (e‐health) literacy level of high school students and its relationship with their health‐promoting behaviours.MethodsThis was a cross‐sectional study conducted between April and May 2018. The study sample consisted of 409 students, who were aged between 14 and 19 years old, in three high schools located in the city centre of Denizli. Multiple regression analyses were performed to examine the predictive variables for six dimensions of health‐promoting behaviours.ResultsIn this study, the mean (SD) e‐health literacy score of 27.89 (6.19) was slightly above moderate level. e‐Health literacy was found to significantly predict all six dimensions of health‐promoting behaviours positively, that is, e‐health literacy was determined to predict the dimensions of nutritional behaviours (β = 0.64, P < 0.001), life appreciation (β = 0.55, P < 0.001), social support (β = 0.72, P < 0.001), exercise (β = 0.36, P < 0.001), stress management (β = −0.22, P < 0.001) and health responsibility (β = 0.68, P < 0.001).ConclusionWith e‐health literacy significantly predictive of health‐promoting behaviours, nurses are recommended to consider the e‐health literacy levels of adolescents in the health‐promoting programs they design.