11 Introduction: There is a high teenage pregnancy in Lake Victoria Island and Mountain districts of 12 Uganda. Teenage pregnancy is highly associated with abortions, infant and maternal mortality, high 13 rate of unemployment, school failure and drop-outs and limited future career opportunities. This 14 paper identifies and explains the factors influencing teenage pregnancy in Uganda Lake Victoria Island 15 shoreline area and mountain districts. 16 Methods: The analysis focused on 405 girls aged 15-19 years, generated from the 2016 Uganda 17 demographic and Health Survey. Odds ratios with 95% confidence interval and p-values were 18 computed using appropriate logistic regression models to determine the presence and strength of 19 associations between the teenage pregnancy and independent variables. 20 Results: Age, residence, secondary or higher education level, female-headed households, marital 21 status (married), occupation, wealth index(rich quintile), and knowledge of ovulation cycle were found 22 to have statistically significant associations with teenage pregnancy. 23 Conclusion: Increased age, rural residence, occupation(not working), and knowledge of ovulation 24 cycle were statistically significant predisposing factors of teenage pregnancy in Uganda Lake Victoria 25 Island shoreline area and mountain districts. Teenagers in these study areas should be provided with 26 sexual education as well as teenage-friendly health services at health facilities that include a wide range 27 of options, as well as medically accurate counselling and information could mitigate teenage 28 pregnancy. 29 Keywords: 30 Teenage pregnancy, predisposing factors, Uganda 31 32 Introduction 33 Teenage pregnancy and childbirth to women less than 20 years old continues to be a major global 34 public health concern, affecting more than 16 million girls and young women worldwide (WHO, 2014). 35 Teenage pregnancy is highly associated with abortions, infant and maternal mortality, high rate of 36 unemployment, school failure and drop-outs and limited future career opportunities. As a result of 37 increased awareness of the socioeconomic consequences of teenage pregnancy, researchers and policy 38 makers have concluded that teenage pregnancy and childbearing is a serious problem (Gebregzabher, 2