Jordan Valley is a city in Malheur County, Oregon, United States. It is part of the Ontario, OR–ID Micropolitan Statistical Area. The city lies alon…Jordan Valley is a city in Malheur County, Oregon, United States. It is part of the Ontario, OR–ID Micropolitan Statistical Area. The city lies along Jordan Creek, a tributary of the Owyhee River; the creek is named for a 19th-century prospector, Michael M. Jordan. The population was 181 at the 2010 census.