This paper adopts a network data envelopment analysis (DEA) model combined with a window analysis approach to evaluate the ecological efficiency (eco‐efficiency) of 30 regions in China over 2000–2015. We also investigate the existence of eco‐efficiency convergence clubs among these regions and analyse the important factors that drive eco‐efficiency club formation. Our results reveal that, overall, Chinese regional eco‐efficiency deteriorated from 2000 to 2015. We find that there is a significant regional disparity in eco‐efficiency. Our convergence analysis indicates that Chinese regions converge into three eco‐efficiency clubs, suggesting that common economic and environment policies might have a limited impact on promoting regional eco‐efficiency and regionally‐tailored policies need to be designed. Finally, we find that forest coverage, R&D expenditure and pollution punishment are important determinants of convergence club membership.