Teenagers nowadays cannot survive socially without internet. This justifies a study on the factors that help to reduce risk and harm on the internet for teenagers. The World Wide Web (WWW) should be able to bring them together and provide easy access to information. This will hopefully result with a new generation of teenagers having better accessibility in education and knowledge. Unfortunately, this may not be the case. Children are suffering due to dark side of technology throughout the world, especially in the developing countries. Child abuse is increasing through online in Bangladesh slowly but gradually at a steady rate. The study was aimed to identify the demographic factors that are related to online risks and harm among teenagers in Bangladesh. The instrument which was developed to collect data was survey questionnaire. Total 443 teenagers’ data were collected among which 378 respondents were from urban area and the rest from rural area. Survey was administrated in person by going through in each class in every institution. The findings indicated Age and SES (socio-economic status) under Demographic Factors are statistically significantly related to online risks as well as harm among Teenagers in Bangladesh. However, gender was found