Katalin Erdélyi (born Hungary, 1982) is Deputy Editor-in-Chief at Atlatszo.
She mostly writes about corruption and public procurement in Hungary. She is also the editor of the political commentary blog Thick Skin (Vastagbőr) and of a popular Facebook page that monitors the quality of meals served in Hungarian hospitals. She began writing about politics as a hobby in 2008 and has worked for atlatszo.hu since 2012.