Winnifred Sprague Huck (née Mason; September 14, 1882 – August 24, 1936) was an American journalist and politician from the state of Illinois who became the third woman to serve in the United States Congress, after Jeannette Rankin and Alice Mary Robertson, the first woman to represent Illinois in Congress, the first woman to win a special election for the United States Congress, and the first mother.

[2] She was elected to fill the at-large seat of her father, Representative William Ernest Mason, after his death.

Huck was born Winnifred Sprague Mason in Chicago, Illinois, and attended public schools in Chicago and in Washington, D.C. She worked as her father's secretary.

She was an unsuccessful candidate for renomination to the 68th Congress in 1922, and an unsuccessful candidate for nomination for a special election (February 27, 1923) to fill the vacancy caused by the death of Representative James Mann.

Huck died in Chicago, and her ashes were interred in Oakwood Cemetery, in Waukegan, Illinois.