Mary Ross Ellingson (1906–1993) was a 20th-century Classical archaeologist who worked on the excavations at Olynthus in Greece, where she focused on the use of terracotta figurines in ancient Greece. She did not receive due credit for her work at the time because her research was published by her mentor, David Moore Robinson, under his own name. Robinson's plagiarism of her work only came to light in 2014.