Tualatin is a city that is a southwestern suburb of Portland, Oregon, United States. It is located south of Tigard in Washington County, one of three Oregon counties that contain the Portland Metropolitan Area. The population was 22,791 at the 2000 census. The 2006 estimate is 25,650 residents. Tualatin apartments for rent comparison page shows most up to date rent information on Tualatin apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.