Ellen Osiier (13 August 1890 – 6 September 1962) was a Danish foil fencer.

Osiier, then 33, won the gold medal and went undefeated in the 16 matches she fenced in the event.

[3][4] With this victory, Osiier became the Olympics' first woman fencing champion.

[5] Her husband, Ivan Osiier, fenced in seven Olympics, won a silver medal in individual épée for Denmark at the 1912 Olympics, and won 25 Danish national championships in three weapons.

[6][7] This biographical article related to fencing in Denmark is a stub.