99328 Frequently Asked Questions

A: ZIP Code 99328 is Located in Dayton Washington. Portions of 99328 are also in Starbuck.

A: ZIP Code 99328 is Located Entirely in Columbia County Washington.

A: The Current Sales Tax in ZIP Code 99328 is 8.4%

A: The Area Code for 99328 is 509.

A: ZIP Code 99328 is in the Washington 5th Congressional District.

A: ZIP Code 99328 is in Washington State House of Representatives District 9.

A: ZIP Code 99328 is in Washington State Senate District 9.

A: The 2022 population of ZIP Code 99328 is 3669. The population growth rate in 99328 is -1.87%.

A: The majority race/ethnicity of people residing in 99328 is White (89.31%). The majority race/ethnicity of students attending public schools in 99328 is White(74.81%).

A: The median household income in 99328 is $68,073 (2021) and the average adjusted income is $66,080 (2020).