Pasco, Washington
Pasco is a city in, and the county seat of, Franklin County, Washington, United States. It had a population of 59,781 at the 2010 census, and 75,432 as of the July 1, 2019 Census Bureau estimate.Pasco is one of three cities that make up Washington state's Tri-Cities region, a mid-sized metropolitan area of approximately 296,224 people.