Organizational structure, a fundamental aspect of organizational behavior, has undergone significant evolution since the Industrial Revolution, continually adapting to modern needs. Flattened organizational structures, which emphasize team-oriented leadership, facilitate faster communication and decision-making processes. The interaction between team leadership and organizational structure is thus pivotal in making sense of the growth challenges Pentecostal churches face today. This study sought to clarify the extent to which organizational structure influences the effectiveness of team leadership for realizing growth of Pentecostal churches in Kenya. The study adopted a cross-sectional research design. The target population was 7,626 leaders comprising of bishops, reverends, and pastors. Questionnaires were successfully administered to 318 participants. Data was analysed using moderated regression analysis in SPSS. Results showed that organizational structure had a statistically significant main effect on church growth (β=.682, p=.000) but its moderating effect was insignificant (β=-.090, p>.05).