ABSTRACT Stunting is a state of the body that is short and so short that it exceeds the SD-2 deficit below the median length or height. Stunting is a public health problem because it is associated with an increased risk of morbidity and death, delayed motor development and stunted mental growth. The general objective of the study was to find out the most dominant determinant factors related to stunting in infants aged 6-24 months at UPT Puskesmas Garum, Blitar Regency. This research is quantitative using a cross sectional research design with a total sample of 151 toddlers. This research was conducted by processing secondary data from the Weigh Month Results of the Garum Health Center UPT and Blitar District Health Office in February 2019. The interview respondents were conducted in November 2019. Variables used include stunting toddlers, nutritional status of pregnant women and exclusive breastfeeding. Data processing and analysis using chi square test (bivariate) and multiple logistic regression (multivariate). The results of the analysis showed that based on the TB / U index, stunting toddlers were 73.9%. Chi square test results show that there is a relationship between stunting toddlers aged 6-24 months based on the history of the nutritional status of pregnant women, the history of the baby's birth weight and the history of exclusive breastfeeding. The results of multivariate analysis showed that the most dominant independent variables related to stunting under five were birth weight after being controlled by the nutritional status variable of pregnant women and exclusive breastfeeding.