Katherine, Catherine, Katharine, Kathryn or Kathy Williams may refer to:
Katharine Isabella Williams (1848–1917), British chemist Kath Williams (1895–1975), Australian women's activist Katharine Williams, Australian judge Kathryn Williams (born 1974), English singer-songwriter Kathy Williams, a character in The Fog Catherine G. Williams (1914–2020), American social worker Catherine Mary Douge Williams (c. 1832–1884), African-American suffragist and educator
See also Catharine R. Williams (1787–1872), American writer and suffragist Cathy Williams (born 1957), British writer of romance novels Kathryn Harby-Williams (born 1969), Australian netball player and television presenter Katherine Dienes (born 1970), also known as Katherine Dienes-Williams, a New Zealand-born organist and conductor Katie Williams (disambiguation) Kate Williams (disambiguation) Kathleen Williams (disambiguation) Williams (surname)