Recent studies indicate that partisan electoral interventions, a situation where a foreign power tries to determine the election results in another country, can have significant effects on the election results in the targeted country as well as other important influences. Nevertheless, research on this topic has been hindered by a lack of systematic data of electoral interventions. In this article, I introduce the Partisan Electoral Intervention by the Great Powers dataset (PEIG), which provides data on all such interventions by the US and the USSR/Russia between 1946 and 2000. After describing the dataset construction process, I note some interesting patterns in the data, a few of which stand in contrast to claims made about electoral interventions in the public sphere and give an example of PEIG’s utility. I then describe some applications of PEIG for research on electoral interventions in particular and for peace research in general.