In today’s competitive global higher education market, research productivity has become a dominant criterion for determining the university’s effectiveness. Besides, high-quality research benefits individual academics, their departments and institutions by raising their global rankings, recognition and prestige, with multiple accruing benefits. However, in a situation of low research output from Ugandan public universities, there is urgent need for increased organisational support to facilitate lecturers in conducting this cardinal university function. This mixed-methods study was, therefore, intended to evaluate the effect of the university research policy on lecturers’ research productivity in Kyambogo University, one of the biggest but relatively new public universities in Uganda. A correlational survey design guided the study using both qualitative and quantitative approaches. A sample of 127 PhD-holding lecturers, three faculty deans, Directors of Quality Assurance and Human Resource, the University Bursar and the University Librarian participated in the study. Data collected using questionnaire and interviews were analysed using structural equation modelling for quantitative data while thematic content analysis was used for qualitative data to establish relationships between the variables. The findings revealed moderate policy support for research productivity with a mean value of 3.07, a positive and significant relationship between the variables with a beta value of .416 and a P-value of .000. The study recommended the formulation and implementation of favouring and supportive policies to increase lecturers’ research productivity in public universities. The findings will likely be used to inform university managers on generating practical policy interventions to boost research productivity among lecturers in public universities.