Many previous empirical studies have suggested that cooperation and trust affect economic growth. However, the precise relationship between trust and cooperation (i.e. whether trust leads to cooperation or cooperation leads to trust) remains unclear and it is not known how the level of economic development affects the level of cooperation and trust. Using a combination of public goods, gambling game and trust game experiments, we investigate the links among cooperation, trust and economic development in four regions of China. Our results suggest that, first, there is a U‐shaped or V‐shaped relationship between cooperation and economic development. Second, on the one hand, cooperation leads to trust, and on the other hand, more cooperative behaviour may be created by rewarding trusting behaviour. Third, men are more cooperative and trusting than women. Furthermore, we find that the widely used ‘GSS trust’ question from the General Social Survey (GSS) does not predict either cooperation or trust, whereas the questions ‘GSS fair’ and ‘GSS help’ have weak predictive power for trusting behaviour but not for cooperative behaviour.