Cornelia Frida Katz (Amsterdam, July 29, 1885 – Aerdenhout, March 30, 1963) was a Dutch lawyer and Christian Historical Union politician.
She was the first female member of Parliament to come from a Protestant-Christian party (1922).
Katz was a supporter of the introduction of women's suffrage; she joined the women's movement and became order commissioner at the International Congress for Women's Suffrage in 1904 and in 1909 she became a member of the Amsterdam Department of the Women's Suffrage Union.