Introduction : Nutritional stunting indicates the chronic restriction of a child potential growth, Aim: To assess the prevalence and associated risk factors affecting nutritional stunting among children under five years at Suhag Governorate. Methods: This study had been conducted at Suhag Governorate. The total number of the sample 1268 children who recruited through convenient sample. Results: Slightly less than half (49.1%) of the children were aged und 2 years. 53% of them were boys and 47% were girls,. According to nutritional assessment of children under five years. It was noticed that 23.6% of them had moderate stunting and 11.3% of them had severe stunting while 15.6% of them had moderate underweight, 7.7% of them had severe underweight. Conclusion: More than one third of the studied children were stunted with chronic malnutrition also their mothers had unsatisfactory knowledge about nutritional stunting. Recommendations: Increase awareness of mothers about nutritional stunting, monitoring growth and development of their children, also educational program should be given for mothers of stunting children about nutrition, also small guideline book for mothers with stunting children to improve knowledge practice and attitude toward their children