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Benton County Courthouse (Prosser Office)

Filing information for Benton County Courthouse (Prosser Office) in Prosser, WA. Part of the Benton County small claims court system.

E-FILE!

E-Filing

✓ Available

Max Claim

$10,000

Courthouse Details

Benton County Courthouse (Prosser Office)

620 Market Street

Prosser, WA 99350

Mailing Address

620 Market Street

Prosser, WA 99350

Phone: (509) 786-5710Fax: (509) 783-1310

Hours: Monday - Friday, 8:00 AM to 4:00 PM

Area Served

Prosser and surrounding areas within Benton County

How to File at Benton County Courthouse (Prosser Office)

E-filing available

This court accepts electronic filing for small claims cases.

Note: Electronic filing is available for District Court. A user registration form is required.

File in person

Bring your completed forms to the courthouse during business hours.

File by mail

Most small claims courts accept filing by mail — check with this court first. Typically you mail your completed forms with the filing fee plus a self-addressed stamped envelope for your returned copies.

Ready to get your money back?

A demand letter often settles disputes before a case is ever filed — and it only takes a few minutes.

Read the demand letter guide

Wrong court? Benton County has 2 courts.

See all 2 courts in Benton County

For statewide rules, see the full Washington small claims court guide →

Data verified May 6, 2026.