Hypertension-mediated organ damage (HMOD) represents a critical and dynamic stage on the cardiovascular continuum, serving as the primary mechanistic link between sustained arterial pressure elevation and major adverse cardiovascular and renal events. HMOD is often subclinical at first occurrence and is a systemic, cumulative process, representing structural and functional injury of the heart, brain, kidneys, and vasculature. This narrative review synthesises current evidence on the pathogenesis and clinical sequelae of HMOD, specifically focusing on the interplay between chronic haemodynamic load, endothelial dysfunction, oxidative stress, neurohormonal activation, inflammation, and microvascular remodelling. Key manifestations such as left ventricular hypertrophy, hypertensive nephrosclerosis, cerebral small vessel disease, and arterial stiffness can be regarded as dynamic and partly modifiable phenomena of subclinical injury rather than inevitable sequelae of long-standing hypertension. This review aims to summarise contemporary detection and risk stratification approaches, drawing on the 2023 European Society of Hypertension (ESH) and 2024 European Society of Cardiology (ESC) guidelines, combining imaging and biomarker-based assessment. Evidence supporting organ protection as an important therapeutic objective is also reviewed, with particular attention to regression of left ventricular mass and reduction in albuminuria as treatment endpoints associated with improved prognosis beyond blood pressure reduction alone. Finally, unresolved issues such as causal versus associative properties of candidate biomarkers, comparative validity of vascular indices, and heterogeneity in organ-specific response to therapy are critically analysed. The overarching goal of this review is to support a clinically applicable framework for early HMOD detection and organ-protective treatment strategies in routine hypertension care.