Ellen Helga Louise Hagen (née Wadström; 1873–1967) was a Swedish suffragette, women's rights activist and politician.

In 1896 she married Roger Hagen, governor of Gävleborg country.

She is described as a skillful speaker, and her contribution was appreciated: by her connections, the movement gained supporters from the upper class, who would not otherwise be willing to listen to a speech about women suffrage, and by her glamorous way of dressing, she proved wrong the caricature of a suffragette as "masculine".

After the death of her spouse in 1922, she was proposed by the government to succeed him as governor of Gävleborg country, though this did not come about.

In 1923, she became the launching editor of a Swedish liberal feminist magazine, Tidevarvet.