Katherine Alexander Duer Mackay was an American suffragist, socialite and writer from New York city. She was the founder of the Equal Franchise Society. Her involvement with the women's suffrage movement "encouraged other wealthy women to follow her lead and become involved." She was also the first female member of the Roslyn Union Free School District's school board in Roslyn, New York.
- Occupation
- suffragist, writer
- Citizenship
- United States
- Born
- May 9, 1878, May 9, 1879
- Died
- 1930, April 19, 1930
