Ada Wells née Pike (29 Apr 1863 – 22 Mar 1933) was a feminist and social worker in New Zealand.
Ada Pike was born near Henley-on-Thames, South Oxfordshire, England. Her parents emigrated to New Zealand with their four girls and one boy in 1873, arriving on the Merope in Lyttelton on 31 October of that year. She attended Avonside School from 1874, and Christchurch West High School in 1876, where she then worked as a student-teacher from 1877 to 1881.
Wells attended Canterbury College. In the 1880s she became active in the women's suffrage movement. In 1892 she established the Canterbury Women's Institute, an organization similar to the Women's Franchise Leagues in other parts of the country. She was a founding member of the National Council of Women of New Zealand and served as the first secretary. In 1917 she was the first woman to be elected to the Christchurch City Council.
The Ministry for Culture and Heritage now offers an Ada Wells Memorial Prize for Undergraduate Students.