Dixie is a census-designated place in Walla Walla County, Washington, United States. The population was 197 at the 2010 census. A post office called Dixie has been in operation since 1881. The community has one elementary school, which is administered by the Dixie School District, and feeds older students into Pioneer Middle School and Walla Walla Hig…Dixie is a census-designated place in Walla Walla County, Washington, United States. The population was 197 at the 2010 census. A post office called Dixie has been in operation since 1881. The community has one elementary school, which is administered by the Dixie School District, and feeds older students into Pioneer Middle School and Walla Walla High School in Walla Walla Public Schools.