The rapid growth of new cities in Iran, particularly Sahand as one of the most significant satellite cities of the Tabriz metropolitan area, has been accompanied by considerable challenges in service provision, infrastructure development, employment generation, and quality of life, despite population increases and physical expansion. This study aims to analyze the effectiveness of the urban prosperity approach on the structural organization of the new city of Sahand. The research is applied in purpose, descriptive-analytical in nature, and survey-based in method. The statistical population consists of residents of the new city of Sahand (82,494 individuals). The sample size was determined as 384 participants using the Cochran formula and selected through stratified random sampling. The data collection instrument was a researcher-developed questionnaire based on six dimensions of urban prosperity (productivity, infrastructure development, quality of life, environmental sustainability, equity and social inclusion, and urban governance). The validity and reliability of the instrument were assessed as satisfactory. Data analysis was performed using descriptive statistics and Structural Equation Modeling (SEM) via SmartPLS. The results indicate that the level of urban prosperity in Sahand is suboptimal. Among the six dimensions, only infrastructure development and environmental sustainability demonstrated significant effects on urban prosperity (critical values of 3.02 and 2.65, respectively). The highest level of realization was attributed to infrastructure development (0.608), while the lowest pertained to productivity (0.266). The findings suggest that the new city of Sahand is in the early stages of urban development and requires substantial strengthening in the dimensions of productivity, quality of life (particularly educational and healthcare services), social equity, and urban governance. Furthermore, the localization of urban prosperity indicators in accordance with the specific conditions of new cities in Iran is deemed essential.