The St. Mary’s County Health Department’s general hours of operation are Monday through Friday from 8:00 am – 5:00 pm. Please note: specific program hours may differ. SMCHD offices are closed during State/County holidays – Click here for scheduled closure dates.
For urgent public health situations after business hours, please call the St. Mary’s County Emergency Operations Center at (301) 475-8016 to be connected to a public health official on-call. For medical emergencies, call 9-1-1.
Locations
The St. Mary’s County Health Department operates from four locations across the community.
SMCHD Main Office
21580 Peabody Street
Leonardtown, MD 20650
General Hours:
Monday – Friday from 8:00 a.m. – 5:00 p.m.
Environmental Health Office Hours:
Monday & Thursday from 7:00 a.m. – 2:00 p.m.
Tuesday, Wednesday, from Friday 7:00 a.m. – 4:30 p.m.

Health Hub
21625 Great Mills Road
Lexington Park, MD 20653
Hours:
Monday – Friday from 8:00 a.m. – 5:00 p.m.

Spring Ridge Middle School-Based Health Center
19856 Three Notch Rd
Lexington Park, MD 20653
Hours:
Monday – Friday from 8:00 a.m. – 4:30 p.m.

Margaret Brent Middle School-Based Health Center
29675 Point Lookout Rd
Mechanicsville, MD 20659
Hours:
Monday – Friday from 8:00 a.m. – 4:30 p.m.
