ObjectiveThis study aimed to determine the prevalence of intestinal parasitic infections and associated factors among school-age children in Sebeya primary school, northern Ethiopia, 2017.ResultsThe prevalence of intestinal parasites in school-age children was (29.9%). A total of six parasites were detected in this study. E. histolytica/dispar 19.43% (82/422) and G. lamblia 8.29% (35/422) were the predominant ones. Unclean fingernail (AOR = 1.72), defecating in the open field (AOR = 2.82), and being barefooted (AOR = 1.72) were the determinant factors for intestinal parasitic infections. Frequently washing hands reduced the chance of infections by 68%. Furthermore, children in grade 1–4 and 5–6 had higher odds developing the infections than those in grade 7–8 (AOR = 8.21 and AOR = 2.50, respectively).