Adams County is a county in the U.S. state of Washington. As of the 2020 census, the population was 20,613. The county seat is at Ritzville, and its largest city is Othello. The county was formed out of Whitman County in November 1883 and is named after John Adams, the second President of the United States.
Adams County Courthouse (erected 1941) in 2014
Whitman County, Washington
Whitman County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 47,973. The county seat is Colfax, and its largest city is Pullman.
Colfax Post Office
Colfax
Farmington
Palouse