About the town » Pasco, Franklin County, Washington, 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.