Banks in Prosser, Washington, the US. Banks locations in Prosser, Washington. Find the nearest banks locations, near you. All types of business services Accounting ATM Bank Finance Funeral home Insurance Real estate School University All banks in Prosser Closed now AmericanWest Bank Finance Bank +1 509-786-3545 1115 Meade Avenue, Prosser, Washington 99350 Write a review Phone Hours Website Directions