The Atfalati, also known as the Tualatin or Wapato Lake Indians are a tribe of the Kalapuya Native Americans who originally inhabited and continue to steward some 24 villages on the Tualatin Plains in the northwest part of the U.S. state of Oregon; the Atfalati also live in the hills around Forest Grove, along Wapato Lake and the north fork of the Yamhill River, and into areas of Southern Portland.