Tax Bill Lookup

Christmas and New Year Holiday Hours
The Treasurer's Office will be closed
December 19, 2:30pm-4:30pm
December 25, & 26 of 2025
also
January 1, & 2 of 2026
We will reopen January 5, 2026, with regular hours.
Tax payments can be remitted online (https://payments.municipay.com/md_stmarys/search), by phone (833-424-0200), or by mail during these closed dates. Select ACH/ECHECK at checkout to make a payment without a service fee.
We honor the postmark on your envelope as the payment date.

All payments postmarked on or before December 31, 2025, will be accepted as an on-time payment.

Lookup Directly by Account Number

Search by Name or Address

Last Name

Street Number

Street Name

New Owners, Please note the account ownership information is updated on our website annually. We receive our tax file from the State Department of Assessments and Taxation (SDAT) at the start of the tax year on July 1st. It is best to use the address or parcel number to locate your account.

If you need further assistance, please contact the St. Mary’s County Treasurer’s Office at (301) 475-4200 extension 3300.

St. Mary's County Public Water and Sewer bills are managed by St. Mary's County Metropolitan Commission (MetCom). In accordance with Chapter 113-14.H of the code of St. Mary's County, unpaid water and sewer bills, service charges, all penalties and late charges are first liens against the property. For more information visit www.metcom.org or email MetCom customer service at billing@metcom.org

MetCom water and sewer accounts are subject to tax sale based on the following legislation and guidelines. St. Mary's County Treasurer's Office includes these accounts in our annual tax sale.

Tax Bill Lookup

Lookup Directly by Account Number

Search by Name or Address

Additional Links and Resources

Taxes - Real Property

Taxes - Personal Property

Tax Credit Programs and Exemptions

General Information