Kiti Karaka Rīwai (12 September 1870 – 21 January 1927) (also known as Kiti Karaka, Catherine Clark, Kate Clark, Kitty Clark, Kiti Karaka Te Ao Ahitana, or Kiti Ashton)^[1] was a New Zealand tribal leader. She was born in Ruapuke Island, Southland, New Zealand in 1870, to parents Arapetere Karaka (Albert Clark) and Mary (née Owen).^[2][3]

Of Māori and Moriori descent, she identified with the Kāti Māmoe iwi. Her first husband was Riwai Te Ropiha, a Moriori of the Chatham Islands, with whom she had nine children before divorcing in the early 1900s.^[1][3] Her second husband was Te Ao Ahitana Matenga (Joseph Ashton) of Ngāti Kahungunu, with whom she had one child, Joey Ashton.^[4]

She helped build the meeting house in Wairua in the 1890s.^[5] She died in Greytown in 1927.^[1][3]