Tanja Fajon (English: Tanya Fayon; born May 9, 1971) is a Slovenian politician and Member of the European Parliament (MEP) from Slovenia.
She is a member of the Social Democrats, part of the Party of European Socialists.
She is currently a head of the Slovenian delegation within the political group of Progressive Alliance of Socialists and Democrats, and a vice-president of the Social Democrats.
She is also the author of several documentaries, including Rise of the extreme right in Europe, Human tragedies at the doorstep of Europe, and Constitution of European Union.