PurposeThe role of mass media in promoting social norms surrounding contraceptive use among adolescents in developing countries has not received much attention. Hence, program planners have little guidance on how to design media messages that take advantage of existing social norms in promoting contraceptive use.MethodsWe analyzed data from the Demographic and Health Surveys in Ethiopia and Tanzania, restricting our sample to 15- to 24 year-old adolescents (N = 6,230 and N = 5,138, respectively). We proposed and tested the hypotheses that collective norms around contraception use would be associated with individual contraception use in that area and that this relationship would be stronger when media use is low, than when media use is high. Logistic regressions were run to predict individual-level contraception use from collective norms for contraception use, media use, and their interaction, controlling for age, urban versus rural location, marital status, wealth, and education, taking into account intraclass correlations within clusters.ResultsCollective norms were associated with individual contraception use in both samples. Media use attenuated the association between collective norms and contraception use in Ethiopia but not in Tanzania. (ÎČ = â.22, p = < .01 in Ethiopia and ÎČ = â.08, p = .10 in Tanzania).ConclusionsMass media can serve as external agents of change to attenuate the impact of collective norms on individual behavior. A deeper examination of how and why media use attenuates the relationship between collective norms and individual contraception use in some subpopulations more than others is warranted.