This thesis investigates the accessibility of essential public services in the Lazio region (Italy), with a particular focus on the most vulnerable territorial units: municipalities with fewer than 40,000 inhabitants. The motivation stems from the observation that larger urban centres generally host a full range of services and thus present fewer accessibility issues, whereas smaller municipalities often suffer from infrastructural disparities. The analysis adopts the urban cores as the fundamental spatial unit, as these represent the actual population concentrations within municipal boundaries. The study focuses on key sectors such as healthcare and education, for which accessibility is assessed by computing travel distances and times from each urban cores to the nearest service facility.