Abstract : The paper addresses challenges in measuring sustainable development indicators in cities, highlighting the importance of considering variations in city categories and sizes. It emphasises that problems arise from measurement methods that do not account for differences in developmental capabilities and categories of cities. The study proposes a novel approach to reclassifying sustainable development indicators based on the developmental capabilities of each city, with a specific focus on the Al-Qassim region in Saudi Arabia. By studying the developmental capabilities of urban settlements in Al-Qassim and linking them to Sustainable Development Goals (SDGs), the research aims to establish a connection between these capabilities and relevant indicators. This process involves excluding certain indicators or adjusting calculation methods based on the developmental capacities of cities, ensuring a more accurate reflection of their sustainable development performance. The classification process involves assessing variables such as population size, service centrality, and spatial centrality to determine the minimum threshold for urban settlements. Cities that fall below this threshold are excluded from the analysis. The study highlights the need to reevaluate indicators related to population size and service levels, especially for cities with regional roles, to align measurement methods with the specific characteristics of each city. Ultimately, the research underscores the significance of aligning sustainable development indicators with the developmental capabilities of cities to enhance decision-making processes and promote more effective urban development strategies.