Martha Reinhard Smallwood Field (May 24, 1854 – December 19, 1898), known as Mattie Field, was an American journalist. She usually wrote under the pen name Catherine Cole or Catharine Cole. She was one of the earliest professional women newspaper reporters in New Orleans, Louisiana. A champion of women's education and social justice, she also founded the city's first circulating library and helped found a number of other civic institutions.