Washington County Treasurer & Tax Collector Office

Find Washington County Pennsylvania treasurer, tax collector, tax assessor, and property assessor offices. Treasurers and tax collectors provide information on property searches, tax bills, property liens, tax assessed values, and deductions.


Finleyville Tax Collector 3904 Finleyville Elrama Road Finleyville PA 15332 724-348-9000


Monongahela Treasurer 449 West Main Street Monongahela PA 15063 724-258-4750

Peters Township Tax Collector 610 East McMurray Road Canonsburg PA 15317 724-941-8550

Smith Township Tax Collector 1 Biscayne Drive Slovan PA 15078 724-947-2649

Washington County Tax Claim Bureau 100 West Beau Street Washington PA 15301 724-228-6767

Washington Treasurer 55 West Maiden Street Washington PA 15301 724-223-4220

About Treasurer & Tax Collector Offices

What forms of payment are accepted by Tax Collectors?

Tax Collectors will generally accept cash, personal checks, and credit card payments. Many will also offer online payments using electronic checks, credit cards, or PayPal. It is common for a convenience charge to be added to online payments.

What are special assessments?

Special assessments are additional charges on a property, which are usually associated with a public improvement that benefits certain property owners, such as a sewer assessment. Special assessments are usually added to the owner's property tax bill.

What are supplemental tax bills?

Supplemental tax bills are additional property tax bills that result from a re-appraisal of a property, usually because of a transfer of ownership or a physical improvement or expansion to the property. If the reappraisal determines that additional taxes are owed, a supplemental tax bill is issued.