We curated the SCO-95 data set of 95 octahedral mononuclear Fe(II) SCO complexes from the CSD 123 , which are crystallized at low and high temperatures. A CSV file containing information about each SCO complex is provided in the Supporting Information ZIP file. Our data set consists primarily (41%) of bis tridentate ligands followed by hexadentate (ca. 20%). Most complexes are homoleptic, and the vast majority (97%) coordinate Fe(II) with nitrogen, while a minority contain oxygen or sulfur coordinating atoms (Supporting Information Table and).