This study explored the integration of Public-Private Partnership (PPP) models and their impact on the financial sustainability of public universities in the North-Central Zone of Nigeria. Using a descriptive survey research design, it assessed the extent to which PPPs are embedded in university financial management systems, their effect on key sustainability indicators such as revenue diversification, cost efficiency, infrastructure development, and financial stability as well as the institutional, policy, and operational challenges influencing effective integration. It also examined strategic approaches for strengthening PPP-driven financial sustainability. The study population consisted of 7,250 administrative and academic staff across public universities in the region, including Vice Chancellors, Bursars, Heads of Departments, Deans, and finance officers. A sample of 350 respondents was selected through a multistage sampling process involving state-based stratification, random selection of universities, and proportional stratified sampling by staff category, ensuring representativeness and enhancing the reliability and generalizability of the findings. Data were gathered using a researcher-designed instrument, the Public-Private Partnership and Financial Sustainability Questionnaire (PPP-FSQ), and analyzed using mean, standard deviation, independent samples t-test, and one-sample t-test at the 0.05 level of significance. The findings showed that PPP models are only minimally and inconsistently integrated into university financial management systems, leading to a generally weak impact on financial sustainability outcomes. However, hypothesis testing revealed a significant difference in financial sustainability between institutions that have integrated PPPs and those that have not, highlighting the positive potential of PPPs when properly institutionalized. Key challenges identified include weak regulatory structures, limited institutional capacity, unclear policy frameworks, lack of transparency, and bureaucratic bottlenecks. Recommended strategies include policy reforms, capacity development, the creation of dedicated PPP units, active stakeholder engagement, and the adoption of performance-based accountability systems. The study concludes that achieving sustainable university financing in Nigeria requires moving beyond isolated PPP initiatives toward embedding PPPs as integral components of financial governance and sustainability frameworks, thereby providing a systems-oriented approach to higher education financing reform in developing economies.