The aim of this paper is to establish a typology of spatial decision problems. The proposed typology is obtained by a crossover between the different types of spatial entities associated with spatial potential actions (i.e. point, line, polygon or network) and the different modes that can be used to approach spatial decision problems (i.e. static, temporal, real-time or sequential). The combination of these two dimensions provides exactly sixteen basic families of spatial decision problems. The obtained typology does not include explicitly problems that involve actions based on composed entities. Nevertheless, it is still adequate to describe most of them since these last ones are usually decomposed into a series of basic problems, each one involves only one atomic action type.