This dataset corresponds to the processed data presented in our paper "Ground State Cooling of an Ultracoherent Electromechanical System", currently available as a preprint at https://arxiv.org/abs/2107.05552 The dataset is composed of 10 json files comprising the data for each figure of the main texte and the supplementary information, as well as a Jupyter notebook comprising 10 cells, each for plotting a figure of the main text or the supplementary information of the manuscript from the provided json files. A comment at the beginning of the cell indicates which figure will be plotted.