Dataset for the paper "Local structure of potassium doped nickel oxide: a combined experimental-theoretical study", Friederike Wrobel, Hyeondeok Shin, George E. Sterbinsky, Haw-Wen Hsiao, Jian-Min Zuo, Panchapakesan Ganesh, Jaron T. Krogel, Anouar Benali, Paul R.C. Kent, Olle Heinonen, and Anand Bhattacharya, Physical Review M (2019).