Tax Payment Drop Box

The Benton County Treasurer's Office has opened the drop boxes outside both the Prosser Courthouse and the Kennewick Annex for property tax payments. The drop boxes are designated for property tax payments made by check.

The drop box locations are:

Benton County Kennewick Annex:

7122 W. Okanogan Pl #E110, Kennewick, WA 99336

Benton County Prosser Courthouse:

620 Market St, Prosser, WA 99350

Richland City Hall: (will be open by Oct 15th, 2021)

625 Swift Blvd, Richland, WA 99352