Introduction This research analyzes the prevalence of sexting and socio-demographic correlates in a sample of 647 adolescents administered a questionnaire at secondary schools in Valencia (Spain). Methods The questionnaire results indicate that 61% of respondents reported being involved in at least one case of sexting, with 24, 58, and 18% reporting having sent a sext, received a sext, and forwarded a sext, respectively. Results More males and older adolescents reported having received and forwarded sexts than female and younger adolescents. Conclusions Furthermore, time spent using Information and Communications Technology (ICT) devices, use and frequency of use of social media, grade repetition, low academic performance expectations in Math, and a single-parent family situation appear to correlate with an increase in the prevalence of sexting experiences. Policy Implications Our study also provides results that can support new lines of inquiry into analyzing the relationship between sexting and certain socio-demographic, family situation, and educational variables in relation to adolescents.