The study was conducted in school going children in an urban slum of Nakuru Municipality of Nakuru County, Kenya. The main objective of this study was to estimate the levels and identify the factors associated with intestinal parasitic infections among school going children residing in an urban slum. A cross-sectional study design was used to select subjects from whom stool specimens were obtained. Two primary schools were randomly selected and used to select 20 pupils from each class (Class 4 to 8). A total of 200 children were randomly selected from the age between 9-17 years. Direct microscopy and concentration methods were used to examine stool samples to detect cysts of protozoa, and larvae and ova of helminthes. 27 stool specimens out of 100 specimens collected from one study site were found to contain cysts or ova of some intestinal parasites while 22 out of 100 stool specimens collected from the other study site were found to contain cysts or ova of some intestinal parasites; no adult worms, neither proglottids of Taenia species were seen in stool specimens from both study sites. Anthropometric measurements were also determined. There were high levels of parasitic infestations that could be attributed to unhygienic conditions, improper disposal of sewage and the non-availability of potable water supplies in the urban slum areas. The study recommends further studies on children in other schools within the slum areas, additional studies in other children attending schools out of the slum areas and regular de-worming programs introduced and enhanced in the affected areas.