Wadi Ara or Nahal 'Iron, is a valley and its surrounding area in Israel populated mainly by Arab Israelis. The area is also known as the "Northern Triangle".

The Triangle, formerly referred to as the Little Triangle, is a concentration of Israeli Arab towns and villages adjacent to the Green Line, located in the eastern Sharon plain among the Samarian foothills; this area is located within the easternmost boundaries of both the Central District and Haifa District. The eleven towns are home to approximately 250,000 Arab citizens of Israel, representing between 10-15% of Israel's Palestinian Arab population.