Spray is a city in Wheeler County, Oregon, United States. The population was 160 at the 2010 census. Spray was named for John Fremont Sp…Spray is a city in Wheeler County, Oregon, United States. The population was 160 at the 2010 census. Spray was named for John Fremont Spray, the community's founder and first postmaster, and his wife, Mary E. Spray. The post office was established in 1900. In that same year, John Spray established a ferry to carry people across the John Day River, and he helped establish a school and a store in the community.