Constitutional commissions are currently a widely celebrated phenomenon in public governance. Many democracies all over the world, including Kenya have adopted independent constitutional commissions as a system of governance to improve service delivery. Researchers have generally supported the position that board collaboration influences service delivery. The purpose of the study was to establish the influence of board collaboration on service delivery in constitutional commissions in Kenya. The theory was hinged to Stewardship Theory. The study adopted both descriptive survey and exploratory research designs, and used both qualitative and quantitative approaches. The units of analysis were constitutional commissions of Kenya created by the chapter 15 of the Constitution of Kenya and Act of Parliament. The target population was the 202 (CEOs, head of departments and board members) in the constitutional commissions in Kenya. The data was analyzed using both descriptive and inferential statistics. Results revealed that board collaboration had a positive and significant relationship with service delivery in the constitutional commissions in Kenya. The study implies that fostering effective board collaboration is crucial for enhancing service delivery in Kenya's constitutional commissions, suggesting a strategic focus on collaborative governance practices.