Winifred Estelle Branstetter (née Shirley; March 19, 1879 – November 15, 1960) was an American suffragette, writer, and Socialist Party of America politician.

[1] Winnie had homestead with her father in Cleveland County in the Land Rush of 1889, before moving to Kansas City in 1890.

[2] She went to Kansas City schools and worked as a department store clerk until she met and married Otto Branstetter in 1899.

[8] After her homestead claim was approved in September 1909, she sold her New Mexico farm and returned to Oklahoma.

[1] She and Otto moved to Chicago in 1913 where she continued to serve as an officer for the Women's National Committee.

She was a frequent contributor to The Socialist Woman, writing articles for women's suffrage and against child labor aimed towards the wives of tenant farmers in Oklahoma.

[15] In "The Same Story" from the same year, she recounted a meeting with a destitute man who had left his wife and daughter to travel and find work.