This study investigated whether dapagliflozin, a sodium-glucose cotransporter 2 inhibitor, alleviates myocardial hypertrophy by modulating the AMP-activated protein kinase (AMPK)/nuclear factor E2-related factor 2 (Nrf2) signaling pathway, thereby reducing oxidative stress and ferroptosis. A rat model of myocardial hypertrophy was created using abdominal aortic stenosis. Rats were divided into blank, sham, surgery (Abdominal Aortic Coarctation, AAC), and dapagliflozin-treated groups (n = 4), with evaluations at 2, 4, 8, and 12 weeks post-surgery. In vitro, an isoproterenol-induced hypertrophic model in H9C2 cardiomyocytes was used, involving control, ISO, dapagliflozin intervention, and separate or combined intervention groups with AMPK and Nrf2 inhibitors. Dapagliflozin treatment significantly improved cardiac function in pressure-overloaded rats, reduced myocardial hypertrophy and fibrosis, and lowered myocardial hypertrophy marker expression. It also enhanced superoxide dismutase activity, decreased malondialdehyde levels and myocardial iron deposition, and improved mitochondrial ultrastructural integrity, indicative of reduced ferroptosis. Mechanistic studies showed that dapagliflozin activates AMPK phosphorylation, promotes Nrf2 nuclear translocation, and upregulates downstream proteins. This protective effect was nullified when either AMPK or Nrf2 was specifically inhibited. Further, changes in expression levels following separate inhibition of AMPK and Nrf2 confirmed AMPK's regulatory role over Nrf2. In conclusion, dapagliflozin mitigates stress-induced myocardial hypertrophy by activating the AMPK/Nrf2 signaling pathway at least in the early stages, boosting myocardial antioxidant defence, and inhibiting ferroptosis. This study identifies the AMPK/Nrf2 pathway as a crucial mechanism in dapagliflozin's cardiovascular protective effects.