I was very wrong in asserting that there were few women Art Nouveau Artists. So I made this list of female artist of the relative time period of art nouveau late 1800s to early 1900s, that in my opinion fall into the category of Art Nouveau or have many elements that Art Nouveau art has. However, some are a bit less Art Nouveau than others. A lot of these women were illustrators for magazines or Children’s books so their styles reflect the changes in popular culture. This is all the female artist I found in the past 3 hours of researching. Given how many I was able to find I know there are more out there, it just would take more digging!
Sarah Stilwell Weber
Alice B. Preston
Marjorie Miller
Ruth Eastman
Jane Atché
Ethel Léontine Gabain
Mela Koehler
Emma Florence Harrison
Florence Susan Harrison
Cornelia Paczka
Neysa Moran McMein
Bertha Lum
Margaret Evans Price
Helen Adelaide Lamb
Jessie M. King
Phoebe Anna Traquair
Otolia Kraszewska (Academic Oil Paintings, Art Nouveau Illustration)
Florence Mary Anderson
Dorothy Lathrop (Art Deco)
Elizabeth Shippen Green
Jennie Harbour (Art Deco)
Ann Macbeth
Isobel Lilian Gloag
Jessie Willcox Smith
Elizabeth Adela Stanhope Forbes (Pre-raphaelite)
Maria Yakunchikova
Annie French
Ida Rentoul Outhwaite
Helen Dryden (Art Deco)
Elizabeth Mary Watt
Elenore Abbott
Katharine Cameron
Elisabeth Sonrel (Symbolist)
Margaret Macdonald Mackintosh
Frances MacDonald
Violet Moore Higgins
Amelia Bauerle
Anne Estelle Rice
Eleanor Fortescue-Brickdale (Pre-rapheaelite)
Dorothy Fitchew
Nell Brinkley