Washington, Western United States, Northwestern United States, Contiguous United States, North America, United States of America, United States, with Territories, Pacific Northwest, Continental United States, West Coast of the United States
Pasco is a city in and the county seat of Franklin County, Washington, United States. Pasco is one of three cities that make up the Tri-Cities region of the state of Washington. The Tri-Cities is a mid-sized metropolitan area of approximately 264,133 people that also includes the cities of Kennewick and Richland in 2011 estimate. The population was 59,781 at the 2010 census and 65,600 at the April 1, 2013 Washington State Population estimate.