Judith Winsor Smith (née McLauthlin; November 26, 1821 – December 12, 1921) was an American women's suffrage activist, social reformer, and abolitionist.

Her father was the groundskeeper for the shipbuilder Ezra Weston, and her maternal grandfather was the physician and painter Rufus Hathaway.

[2][note 1] In a 1920 Boston Globe interview, Smith claimed that her father had been an abolitionist and "had a station on the underground railway.

They established a sewing school for girls, raised funds for various charities, and sent delegates to national women's club conventions.

The club met monthly at Smith's home until it outgrew that space, and they began meeting at a local hall.

[14] At the age of 89, Smith stood outside the polls for two hours on election day, handing out suffrage leaflets.

[12] Alice Stone Blackwell was so impressed she wrote Smith a poem for her 90th birthday: For two long hours on election day, not long ago She stood where the voters streamed past in a row And gave suffrage leaflets to all who would take them Now isn't she plucky, and good as they make them?