Pollinator insects play a fundamental role in maintaining global food security by facilitating the reproduction of flowering plants and enhancing agricultural productivity. More than three-quarters of the world's major food crops depend, at least partially, on animal-mediated pollination, with insects serving as the primary pollinators. Bees, butterflies, moths, flies, beetles, and wasps contribute significantly to crop yield, quality, and genetic diversity. The present study investigates the role of pollinator insects in ensuring global food security through a comprehensive analytical and review-based approach. The study focuses on pollinator diversity, pollination mechanisms, agricultural productivity, ecosystem services, and emerging threats to pollinator populations. The findings indicate that pollinator insects contribute substantially to global crop production, nutritional security, biodiversity conservation, and ecosystem sustainability. Pollination services improve fruit set, seed production, crop quality, and agricultural income. However, factors such as habitat loss, climate change, pesticide exposure, invasive species, and environmental degradation have caused alarming declines in pollinator populations worldwide. The study highlights the urgent need for pollinator conservation strategies, sustainable agricultural practices, habitat restoration, and integrated environmental management to safeguard pollination services and ensure long-term global food security.