Purpose – The purpose of this article is to report findings from an exploratory quantitative survey concerning the relationship between knowledge management (KM) and ICT support of reverse logistics (RL) processes. This study focuses on which processes of RL are supported by ICT, in what extent are the processes supported, and what role KM plays in RL. Besides, barriers of ICT implementation and benefit evaluation approaches of ICT are revealed. Design/methodology/approach – This study is based on explorative statistical analysis of results of quantitative survey gathered from 55 Czech and Slovak companies. The companies vary in size, type of industry and reverse logistics processes. Due to insufficient knowledge of studied phenomenon, cross-sectional sampling was utilized in order to gather the most various answers. Originality/value – Although the research of RL is quite developed in aspects such as: reverse supply chain design, RL process characteristics, decision problems; other aspects such as ICT support, knowledge management, and performance evaluation are less developed. This study tries to enhance the scattered knowledge about these aspects and simultaneously provide suggestions for further (qualitative) research by exploring the reasons, why companies in the RL field do not know or not employ evaluation methods, why they do not focus on knowledge management and how they are measuring the performance of RL. Practical implications – Several interesting outcomes were revealed by this study. First, the data confirmed that the larger the company is the more developed ICT support it has. Second, evaluation of ICT support of RL processes was reported in less than half of the cases. Third, most companies do not perceive significant barriers regarding implementation of ICT support of RL processes. Fourth, companies that have implemented ERP systems report the support of ERPs as effective. Fifth, some approaches to ICT evaluation positively correlate with the level of KM development. These outcomes draw an important implication. Although the companies do not perceive the barriers of ICT support implementation, the effectiveness of such support is perceived positively. This can be caused by low penetration of ICT evaluation. Therefore, the practical implication of these findings for the companies involved in reverse supply chain is to implement knowledge management and ICT evaluation methods in order to gather the knowledge about RL and to be able to make decisions about investment in RL ICT support with proper information.