Intestinal helminthic infestation and malnutrition are considered to be public health problems of global importance by World Health Organization. Intestinal helminthic infestation has been documented as a major contributory factor to malnutrition. This study was carried out to assess the relationship between intestinal helminthiasis and nutritional status of school children in Obio/Akpor Local Government Area of Rivers State. It was a descriptive cross-sectional study carried out from September to November, 2016 among 367 pupils aged 5-12 years. A questionnaire was administered to obtain socio-demographic data and risk factors for intestinal helminthic infestations. Body weight and height of the pupils were determined using weighing scale and height pole respectively. Physical growth of the pupils was classified as stunting, underweight and thinness using height for age Zscore, weight for age Z-score and BMI for age Z-score below 2 standard deviation of the reference median respectively, in the World Health Oganization refrence standard. Stool samples were collected and examined for helminth eggs using Kato- Katz technique. Data were analyzed using Statistical Software for Social Sciences version 17.0 (Chicago IL, USA). The overall prevalence of intestinal helminthic infestations in this study was 5.4%. The most common intestinal helminths was Trichuris trichiura followed by Ascaris lumbricoides. The rate of intestinal helminthic infestation was not significantly associated with age (p=0.438) and sex (p =0.805). Most of the helminth infestations among the school children were light intensity.