Rainbow Valley is a rural neighborhood south of the Gila River, United States. It is unincorporated, meaning it is not within the city of Buckeye but instead Maricopa County. It is a very spread out neighborhood with approximately 34 people per square mile. To the east of Rainbow Valley is a community called Estrella Mountain Ranch. The neighborhood has one store, a Dollar General, but any other stores in the area are located in the Estrella Mountain or Buckeye area. Rainbow Valley has many mountains and hills.