This study examines digital governance and its influence on public service delivery in Port Harcourt, Nigeria, in the post-pandemic era. The main aim of the study is to explore how digital governance frameworks affect service delivery outcomes and institutional readiness in a developing country context. The specific objectives are: (1) to identify and analyze the major challenges confronting the implementation of digital governance in Port Harcourt’s public service sector; (2) to examine the opportunities that digital governance presents for improving efficiency, transparency, and citizen participation in public service delivery; and (3) to propose policy options and institutional strategies for strengthening sustainable digital governance and inclusive service delivery in developing countries. The study is anchored on the Technology Acceptance Model (TAM) developed by Davis (1989), which suggests that perceived usefulness and perceived ease of use shape technological adoption in organizational settings. A descriptive qualitative design was employed, relying on secondary data sourced from government reports, academic journals, policy documents, and publications of international organizations such as the World Bank and UNDP. Data were analyzed using thematic content analysis, focusing on core themes of infrastructure, institutional capacity, transparency, and citizen participation. Key findings indicate that while digital governance platforms and institutional reforms are in place (for example, the Rivers State Tax Management Information System and biometric integration of civil service payrolls), their full potential is constrained by infrastructural deficits, digital access inequities, and limited empirical tracking of outcomes. Opportunities for enhanced efficiency, transparency and participation are documented, though measurable evidence remains sparse. The study concludes that digital governance in Port Harcourt holds considerable promise but requires robust institutional support, inclusive access and rigorous monitoring to yield sustainable impacts. Three recommendations are offered: investment in infrastructure and digital access, strengthening human capacity and digital literacy, and establishing monitoring and evaluation frameworks to track platform performance and inclusivity.