The study examined the effect of private sector funding on the quality of education in secondary schools in Buyende District, Uganda. A cross-sectional survey design was employed with a sample of 120 respondents including teachers, administrators, and district education officers from eight secondary schools. Data were collected using questionnaires and analyzed using descriptive statistics and Pearson correlation analysis. Results revealed a significant positive relationship between private sector funding and education quality (r = 0.742, p < 0.01). Schools with private sector partnerships demonstrated better infrastructure (78%), improved learning materials (82%), and enhanced teacher motivation (71%). The study concluded that private sector funding significantly improved education quality in Buyende District secondary schools. It was recommended that the Ministry of Education should develop comprehensive frameworks for private sector engagement, district education authorities should actively solicit partnerships, and school management should ensure transparent utilization of private funds to sustain educational improvements.