Katharine A. Morey was an American suffragist, Silent Sentinel, officer of the Massachusetts State Branch of the National Woman's Party, and a member of the NWP Advisory Council.

[2][3][4] In 1917, Morey joined with other National Women's Party picketers protesting outside the White House, in Washington, D.C.

The protests were organized to pressure U.S. President Woodrow Wilson to use his influence to move the 19th Amendment forward in Congress.

On June 22, Morey and fellow suffragist Lucy Burns were picketing Pennsylvania Avenue, when they were surrounded by police who demanded they turn over their sign, which read, "‘We shall fight for the things we have always carried nearest our hearts – for democracy, for the right of those who submit to authority to have a voice in their Government.’ President Wilson’s War Message, April 2, 1917.

[5] Later that year, after picketing the White House on Nov. 10, 1917, she was sentenced to 30 days at District Jail and Occoquan Workhouse.