Old Jail Museum - Leonardtown

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Old Jail Museum - Leonardtown Built in 1876 and in use until 1945 by the oldest sheriff’s office in the nation, this building is the 6th of 8 jails/prisons in St. Mary's County history.

One of 4 sites in St. Mary's County on the Underground Railroad Network to Freedom Trail. One of the four museums and historic sites operated by the St. Mary's County Museum Division. The St. Mary's County Museum Division is a division of the St. Mary's County Department of Recreation and Parks and St. Mary's County Government. Disclaimer: https://www.stmaryscountymd.gov/socialdisclaimer

Did you see the great feature video The BayNet did on the Old Jail? Check it out!
10/19/2026

Did you see the great feature video The BayNet did on the Old Jail? Check it out!

10/08/2026

This space is heating up. We're excited about this.

The posts you've been loving lately aren't an accident. The hard, honest history of the Surratt House. The six Clydesdales at Suttler Post Farm that most people don't know are here in . Maryland's Liberty Tree, still alive because someone thought to save it. Sitting down with Chairman Gray for The Long Table. These resonated. You shared them. You told us this is the Southern Maryland you are enjoying.

So we want to dial it up. And before we do, we want to hear it straight from you:

What pulls you in? What do you want more of? What are we missing?

Eight questions, five minutes, no wrong answers, no logins. We'll keep this open for 2 weeks.

Everything you tell us steers what comes next.

Tell us what you're looking for by Oct 16.

https://forms.gle/nZGhkqXVYr89EERY8

We will be open 10am to 5pm!
10/06/2026

We will be open 10am to 5pm!

In observance of Columbus Day, all St. Mary’s County Government (SMCG) administrative offices will be closed on Monday, Oct. 12, 2026. Regular schedules will resume on Tuesday, Oct. 13.

Closure includes:
📚 St. Mary's County Library locations
🍽️ Senior Activity Centers (no home-delivered meals)
🐾 The Animal Adoption and Resource Center

Open on Oct. 12:
🚌 St. Mary's Transit System
♻️ Convenience Centers & St. Andrews Landfill
🏀Recreation & Parks programs and facilities
🏛️ Museums and Historic Sites
⛳ Wicomico Shores Golf Course
Details:https://www.stmaryscountymd.gov/pio/docs/2026-190NewsReleaseColumbusDayOperations.pdf

St. Mary's County Economic Development St. Mary's County Department of Emergency Services Old Jail Museum - Leonardtown St. Clement's Island Museum Piney Point Lighthouse Museum and Historic Park U.S. Colored Troops Interpretive Center at the Lexington Manor Passive Park St. Mary's County Department of Aging & Human Services

05/05/2026
05/05/2026
Pick up and drop off your scavenger hunt here at the museum!
03/31/2026

Pick up and drop off your scavenger hunt here at the museum!

Address

41625 Courthouse Drive
Leonardtown, MD
20650

Opening Hours

Monday 10am - 5pm
Tuesday 10am - 5pm
Wednesday 10am - 5pm
Thursday 10am - 5pm
Friday 10am - 5pm
Saturday 10am - 5pm
Sunday 10am - 5pm

Telephone

(240) 925-3427

Website

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