Background: Stunting is still one of the focuses of health problems in the world. Stunting is caused by many factors, including access to sanitation. Inadequate access to sanitation can cause infectious diseases that impair nutritional absorption in toddlers during digestion, leading to stunting. Objective: This study examines the connection between sanitation access and stunting in East Nusa Tenggara Province along with its confounding variables consisting of access to drinking water, toddler age, gender, and residence. Method: The study design was cross-sectional with a sample size of 4,224 children aged 0-59 months analyzed from the 2023 Indonesian Health Survey (IHS) data. Data were analyzed using univariate, bivariate (ChiSquare test), and multivariate (multiple logistic regression analyses with a risk factor model). Results: Studies showed households with inadequate sanitation access can increase the risk of stunting by 1.56 compared to those with adequate sanitation access. Other factors significantly associated with stunting included toddler age, gender, and residence. The problem of access to sanitation is related to residence and defecation behavior. Conclusion: Increasing indiscriminate defecation behavior can increase exposure to pathogens from feces which can cause diseases such as diarrhea, resulting in malnutrition and stunted growth. To reduce stunting in East Nusa Tenggara Province, the government is suggested to enhance programs to expand access to sanitation, especially in rural areas. © 2025, Universitas Negeri Semarang. All rights reserved.