Abstract : Background: Maternal mortality rate was still high around 359 deaths per 100,000 live births in 2012 in Indonesia. The cause of death was associated with early fertility. Aim: This study aimed to identify the determinants of early fertility in Indonesia. Methods: The data used was derived from the 2012 Indonesia Demographic and Health Survey (IDHS). The analysis of this study used bivariate analysis with Chi-square test and multivariate analysis with logistic regressions. Results: The study showed that 36.7% of respondents who lived in rural gave birth at less than 20 years of age compared to those who lived in urban (25%). About 47.7% women were no education and primary education. About 39.6% women with lower wealth index were more likely to be young mother. Logistic regression analysis found that the early fertility associated with residence (OR=0.81; 95% CI=0.74-0.88), secondary education (OR=0.04; 95% CI=0.03-0.06), higher education (OR=0.10; 95% CI=0.08-0.14), middle wealth index (OR=0.81; 95% CI=0.73-0.90), upper wealth index (OR=0.86; 95% CI=0.77-0.97), and contraceptive use (OR=1.21; 95% CI=1.11-1.33). Recommendation: The early fertility case could be reduced by providing family planning program in Indonesia. Married women need more information on risks of early childbirth and contraceptive methods. Increasing women’s education was an important effort for a better life.