St. Mary's County Child Support Administration
Leonardtown, Maryland
The St. Mary's County Child Support Administration is at 23110 Leonard Hall Drive, Leonardtown, MD 20650. Call the office at (240) 895-7092. It serves St. Mary's County.
How do I contact this office?
Joseph D. Carter Building23110 Leonard Hall Drive
Leonardtown, MD 20650
Mail: P.O. Box 509, Leonardtown, MD 20650
- Phone
- (240) 895-7092
- TTY
- (800) 735-2258
- Hours
- Monday to Friday, 8:00 a.m. to 5:00 p.m.
- Before you go
- Walk-in hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.
- DHS_CSAformsubmission.stmarys@maryland.gov
- Official page
- Office page
Is this my office?
This office serves St. Mary's County.
Not your area? See every Maryland child support office.
Can I handle this without going in?
Often, yes. Many requests don't need a visit:
- Check your case and payments online in MarylandBenefits.
- Pay online, by phone, or by mail: see every way to pay child support in Maryland.
- Ask about your case by phone at (240) 895-7092.
Going in person? Read "Before you go" above, and call first if you can.
Other child support offices near Leonardtown
- Calvert County Child Support Administration Prince Frederick · 16 miles away
- Charles County Child Support Administration La Plata · 24 miles away
- Dorchester County Child Support Administration Cambridge · 36 miles away
More help with Maryland child support
Office details come from the official Maryland office listing, checked October 24, 2026. Sunny Child Support is not affiliated with Child Support Administration, Maryland Department of Human Services. Spot a mistake? Tell us.