Plant hormones act as essential signaling molecules that orchestrate vital processes like growth, development, and responses to environmental challenges. Abiotic stresses, such as drought, salinity, extreme temperatures, heavy metals, and flooding, significantly impact plant growth and survival. Plants must possess intricate systems for sensing, signaling, and responding to these stresses to adapt and endure. This chapter delves into various studies based on how plant hormones such as abscisic acid, auxin, brassinosteroids, cytokinins, ethylene, gibberellins, salicylic acid, jasmonic acid, and strigolactones regulate physiological responses to abiotic stress, with a special focus on crop species. The article further emphasizes the role of nitric oxide (NO) and reactive oxygen species (ROS), which act as crucial signaling molecules in stress mitigation. Furthermore, the intricate interplay of hormonal signaling pathways during stress conditions is also highlighted. This comprehensive overview lays a foundation for biotechnological innovations in phytohormone engineering, with the potential to improve crop resilience and nutrition, and substantially enhance agricultural productivity.