Lack of sex education in schools has been an ongoing issue in Russia, mainly due to conservative opposition to providing accurate sexual health information openly. Many adolescents may be misinformed about contraceptive methods and may not have reliable access to effective contraception. This study assessed sexual behaviour and knowledge of contraceptives among Russian adolescents in the republic of Bashkortostan. Among a convenience sample of 716 Russian high school youth, 60% lacked information about modern contraceptive methods other than condoms. Being male, older, having had school disciplinary problems, and lifetime use of substances were associated with increased likelihood of having sexual intercourse in one's lifetime. Of the sub-sample of participants who had engaged in sexual intercourse, 43.2% endorsed one or more items on an index of sexual risk taking (e.g. multiple partners, no condom use). Additionally, the use of hard drugs and being of other ethnicity relative to Russian (e.g., mixed, Bashkir, Tartar) was associated with risky sexual behaviour. Lack of knowledge of effective contraceptives and the high prevalence of risky sexual behaviours warrants further research into this topic, as well as a call for sexual education programmes in the country.