Ellen Margrethe Løj (born 17 October 1948 in Gedesby, Denmark) is a Danish diplomat.
Between 2014 and 2016, she served as the Special Representative and Head of the United Nations Mission in South Sudan (UNMISS).
Løj served as Denmark's ambassador to the Czech Republic before she was appointed by the United Nations Secretary-General as Special Representative for Liberia in October 2007.
During her time in office, she was also a member of Prime Minister Anders Fogh Rasmussen’s Commission on Effective Development Cooperation with Africa which held meetings between April and October 2008.
[2] In addition to her appointments Løj has also been on the supervisory board of the Danish-German ferry company Scandlines since 1998 and a member of the advisory boards of the Industrialization Fund for Developing Countries and the Investment Fund for Central and Eastern Europe.