This paper explores inter-organisational relationships, in terms of cooperation, between three main types of sport providers at the local level: voluntary sport clubs, for-profit fitness and health clubs, and local sports authorities. Both withinand cross-sector cooperation are analysed and related to organisational characteristics as well as the perceived competition from other sport providers. Data are obtained from three quantitative panel surveys: the Flemish Sport Club Panel 2009, the Flemish Fitness Panel 2009, and the Flemish Local Sports Authorities Panel 2010. The results show that sport providers influence and are influenced by other sport providers in their environment. The three selected groups of sport providers differ with regard to the occurrence and the nature of the cooperation. Local sports authorities (i.e., public sector) are found to be the most cooperative sport provider. Evidence is provided for the use of cooperation as a strategy to meet competitive challenges.