Background: Consumption of a diverse diet and having an improved source of clean water are important factors that can help prevent stunting. Most toddlers both in Indonesia and in East Nusa Tenggara Province have a lack of dietary diversity and consumed clean water from unimproved sources. These conditions affect the nutritional status of toddlers and can have a long impact if not immediately treated. Aim: To analyze the correlation between dietary diversity and source of clean water consumed with nutritional status of stunted toddlers in Kupang Regency. Methods: This research uses secondary data were collected by Community Care Network Foundation and Danone Institute which came from Tesabela, Bolok, Lifuleo and Sumlili Village. This research used a cross sectional study with a restrospective approach. Total research data was 70 data obtained with a total sampling technique used the inclusion criteria, data stunted toddlers aged 12-59 months and data stunted toddlers from Community Care Network Foundation and Danone Institute that are complete according to the researcher's needs and the exclusion criteria, incomplete data Community Care Network Foundation and Danone Institute. Data dietary diversity and clean water sources consumed by subjects were analyzed using rho spearman test. Results: There is a significant correlation between dietary diversity and source of clean water consumed with nutritional status of stunted toddlers as indicated by a significance value of p < 0.001 with a positive or unidirectional correlation. Conclusion: There is a significant correlation between dietary diversity and source of clean water consumed with nutritional status of stunted toddlers in Kupang Regency.