Research background: Innovativeness is one of the factors which contributes to the economic growth of regions and helps to explain differences in the development of individual regions. Regions characterised by an imitative way of implementing innovations and regions where the transfer of already developed technology from outside dominates need different ways of supporting innovation activity and different innovation policies (Capello & Lenzi, 2013). The theoretical base of the research is the concept of a regional innovation system (e.g. Braczyk et al., 1998; Deloreux & Parto, 2005; Autio, 1998) Purpose of the article: The identification of a group of regions characterised by a similar level of indicators covering the features of a regional innovation system. The identification of regions characterised by different types of innovation activity. Methods: Clusters of regions with a similar level of indicators for the features of a regional innovation system were identified with the use of hierarchical clustering (Ward’s method). Sixteen Polish regions are analysed in the years 2006-2013. Five components of a regional innovation system are included: human capital, social capital, innovation cooperation, innovation activity of enterprises, research and development (R&D) activity. Findings & Value added: Based on the clustering results, four types of regional innovations systems in Polish regions can be identified: (1) public R&D based regions; (2) imitative regions, (3) private R&D based regions, (4) diversified innovation activity regions. Public R&D based regions are characterised by a low human capital level. Imitative regions are characterised by a low level of both human and social capital. Private R&D regions have a low human capital level, but compensate this with a very high social capital level. Diversified innovation activity regions are those where various innovation activities are undertaken.