The purpose of this article is to establish whether all the dimensions of institutional pressure matter for sustainability practices of manufacturing medium and large firms using evidence from Uganda. The study was cross-sectional and quantitative in nature. Data was collected through a questionnaire survey of 102 manufacturing firms. Data were analyzed using SmartPLS-SEM version 3. This study fosters the understanding of sustainability practices, as it provides insights on whether all the dimensions of institutional pressure matter for sustainability practices of manufacturing firms in Uganda. Results revealed that all the institutional pressure dimensions (coercive pressures, mimetic, and normative pressures) do matter for sustainability practices of the manufacturing medium and large firms in Uganda. This implies that institutional pressures are a cornerstone for sustainability practices.