Hedwig Thoma was a Swiss painter and commercial artist.

Hedwig Thoma was the daughter of malt manufacturer and brewer Friedrich Hermann Thoma-Schill and grew up in Basel. She was the niece of Emil Schill.

In 1920, she was commissioned to design a series of postcards for Basel Zoo. In 1927, she won a competition organized by Kunstkredit Basel-Stadt to design an “artistic city poster.” The poster was printed and used by the Basel Tourist Office for advertising purposes.

Hedwig Thoma was also mentioned in 1928 in an overview of “Neuerer Frauenkunst in der Schweiz” (Innovative Women's Art in Switzerland) in the edition of the magazine Das Werk published on the occasion of the SAFFA. In the years that followed, she appeared as the illustrator of several children's books by Anna Keller, among others. In 1945, a translation of Sally Salminen's novel Katrina with illustrations by Hedwig Thoma was published in the Gute Schriften series.

Thoma married the artist, art critic, and art educator Hermann Meyer. The couple were friends with Maria La Roche, Louise Weitnauer, and Esther Mengold (1877–1954), the wife of Paul Altherr, among others.