Margaret Center Klingelsmith (November 27, 1852 – January 19, 1931) was an American suffragist, lawyer, translator, and law librarian.

[1] She earned a law degree at the University of Pennsylvania in 1898, as a member of Penn's first class to include women students.

"[5] Klingelsmith was the only woman to be a charter member of the American Association of Law Libraries (AALL) when it was founded in 1906.

[7] A law journal in her day described her as "a noted suffragist and active in suffrage propaganda".

[8] Pointing to portraits of the Founding Fathers, Klingelsmith quipped that "If ruffles and frills and silks and velvets mean weakmindedness surely our republic should have fallen before this.