Soil-transmitted helminth (STH) infections remain an important public health problem among school-aged children, particularly in communities with inadequate sanitation, poor hygiene and limited access to safe water. This study determined the occurrence and intensity of Ascaris lumbricoides, Trichuris trichiura and hookworm infections among primary school children in Gabasawa Local Government Area, Kano State, Nigeria. A cross-sectional descriptive study was conducted among 255 apparently healthy primary school children aged 5–12 years. Stool samples were collected and examined macroscopically and microscopically using direct wet mount and formalin-ether concentration techniques. Parasites were identified based on their characteristic morphological features, while infection intensity was determined using the Kato-Katz technique. Data were analysed using descriptive statistics and chi-square tests, with statistical significance set at p < 0.05. Of the 255 children examined, 65 (25.5%) were infected with at least one intestinal helminth, while 190 (74.5%) were negative. A. lumbricoides was the most prevalent parasite, occurring in 35 (13.7%) children, followed by hookworm with 21 (8.3%) and T. trichiura with 9 (3.5%). Infection was significantly associated with age (p = 0.027), with children aged 8–10 years recording the highest number of infections. Although males had a higher occurrence (14.5%) than females (11.0%), the association between sex and infection was not statistically significant (p = 0.264). Light infections predominated for all three parasites, while heavy infections occurred only with A. lumbricoides. The study demonstrates that STH infections remain prevalent among school children in Gabasawa LGA, highlighting the need for regular deworming, improved sanitation, safe water, personal hygiene and continuous health education.