Born in Southwark,[2] to Richard George Cox, a bootmaker, and his wife Harriet, Hicks grew up in the house of her uncle, Thomas Francis Dicksee. She returned to live with her father when she was fourteen, helping run his business. By the age of 25, she was married to William Hicks with three children, and the family moved to New Zealand. However, the move was unsuccessful, and they returned to England a few years later.[3] The 1881 census gives her profession as a certified midwife.[4] She and William had eight children in all, but two died young. [5]
Inspired by her father's experience in the Chartist movement, Hicks joined the Democratic Federation in 1883, along with her husband and her daughter, Margaretta. She soon became known within the organisation for her focus on women's suffrage. She was elected to the executive council of the renamed Social Democratic Federation (SDF) in 1884, serving for a year.[3]