This chapter presents a quantitative analysis of the Municipality of Ixelles, focusing on statistical indicators related to sustainability, social inequality, and demographic change. Drawing upon municipal datasets, national statistics, and regional reports from the period 2022 to 2024, it examines variables such as population composition, income distribution, housing, education, and employment. Spatial disparities are mapped to illustrate patterns of socio-economic fragmentation within the municipality. The analysis reveals pronounced inequalities between neighborhoods, reflecting broader trends of urban segregation across Brussels. These findings provide a robust, data-driven foundation that complements the qualitative and visual insights developed throughout the wider study.